1 0 0 0 ワモンゴキブリの触覚上感覚毛の微細構造(生理学)
1 0 0 0 OA クロジヨウビタキに就て
1. Donax semignosus DUNKER (Fig. 1), a mussel living at the sandy beach of the sea, manifests a characteristic tidal rhythmic migration. The observation of this rhythmic migration and the experimental analysis of the behaviour at the flood tide were performed at the coast of Okinosu in Tokusima-Si (Fig. 2), during late August and early September in 1937. 2. This animal lives beneath the sand of the beach washed by the waves (Fig. 11 and 12), and at the flood tide it makes shoreward migration inn accord with the rising of the surface of the sea, and at the ebb tide offshore retreat with the lowering of the sea level. The animal thus shows up-and-down movements synchronus with those of the tides. The distance of the migration was 3-6m at the neap tide, but at the spring tide it was often over 30m (Table 1, Figs. 3 and 4). 3. The method of the migration is characteristic. At the flood tide, the mussels lurked beneath the sand suddenly jump out to the surface of the sand just in front of the top of the surf (this motion requires 0.5-1.5 sec.) to be carried shoreward by it and then quickly insure the supporting point by inserting the foot into the sand so as not to be carried back again by the retreating current, nad in the next moment they disappear beneath the sand with quickly repeating motions of the foot (this movement requires 3-6 sec.). By repeating these movements the animals can perform the migration towards the higher parts of the beach (Figs. 5 and 6). On the contrary, at the ebb tide, they suddenly jump out to the surface when the lapped wave just begins to retreat to find themselves in the next moment at the lower parts of the shore, and then burrowing into the sand, disappear from the surface. By repeating these movements the mussels can accomplish the migration towards the lower parts of the shore (Fig. 6). 4. By several experiments and observations, it was proved that the jumping-out behaviout in front of the top of the surf at the flood tide was due to the shock or the vibration of the sand given by the wave when it beats the shore (Figs. 7-10). 5. This migrating behaviour seems to be concerned with food habit of the mussel. It feeds on minute living organisms at the beach and it is convenient for the animal to remain throughout the day at the beach where sand grains and consequently many minute organisms attached to them are always stirred by lapping waves. 6. The wedge-shaped triangular shell and the arrow-headed foot are all well adapted to execute the migration which needs the quick motion of the animal (Fig. 13). Accessory notes: 7. A king of the crab, Remipes truncatifrons MIERS (Fig. 14), which lives abundantly at the same beach mentioned above, shows up-and-down movements synchronous with those of the tides. The quick motion of this animal remembers that of the said mussel.
1 0 0 0 イモリの呼吸反射と感覚刺激(生理)
1 0 0 0 OA ミミズハゼにつく粘液胞子虫について(分類学・形態学・原生動物学)
1 0 0 0 OA ゴキブリ血液中のDG-carrier proteinについて(生化学)
Paraplysia geographica scripta (BERGH)(Text-figs. 1-2). A conspicuous animal in that the rhinophores are conic, colse together and standing far back between the anterior ends of the parapodial lobes. Length of body about 10cm. Cephalic tentacles large, auriculate, widely separated. Parapodia broad and united behind; mantle with a produced siphon behind; mantle-aperture much reduced to a microscopic pore. No purple gland. Pores of hypobranchial gland diffuse. Common genital orifice just in front of the mantle-shield. Foot very large and without a posterior sucking disk. A shell as in Aplysias. General body-colour a yellowish green (olive), but the whole surface of the body except the sole is covered with a fine and extremely complicated network of black. Jaw-plates formed of fibrous rods as usual. Radula formula 50×23-25.1.23-25. Central tooth trapezoid, with 3-4 denticles on either side of the median cusp. Lateral teeth denticulated on both sides. Penis unarmed. Loc.: Hayama, Sagami Bay, by a fishing net from the bottom (Ang. 1949, 2 sps.). Dist.: Amboina, East Indies. According to ENGEL (1936), all the forms of Paraplysia hitherto described must be united as a single species, geographica, which may conveniently be divided into a number of local subspecies. I think the specimens in hand most closely agree with the East Indian subspecies scripta in the possession of the exquisite pencil-drawings on all the surface of the body.
1 0 0 0 OA 日本領内の狼に就てポコック氏に與ふ
Mr.POCOCK attempted (P.Z.S. London, 1935, Part III) to include the Corean wolf together with all the other forms of wolves in Chinese Tartary, Thian Shan, Kashmir, Tibet, Mongolia and China proper in Canis lupus laniger HODGSON. And as the basis of including the Corean wolf in laniger, he says that the skull size and pelage colour of it in my despription may fall into the individual variations among laniger. I clearly stated that Canis lupus coreanus ABE has as large a skull as laniger, and that in the pelage colour there in not a little variation, so that I do not take such points as diagnosis; but that it is recognized by its slenderer snout in comparison with laniger or any other middle sized or large sized wolves. So Mr.POCOCK's protest is wide of the mark. I measured my materials anew and two more skulls in Mr.SAITO's collection (both formerly kept in Uyeno Zoological Garden alive) after POCOCK's method, and I find more clearly that all our materials agree in the slenderer snout in comparison with all the laniger specimens which he showed: Width outside pm^2 being 35, 39, 40, 42 in the former and 47, 481/2, 551/2, in the latter, palate between pm^2 being 29, 29, 28, 301/2 in the former and 33, 351/2, 37 in the latter, palate between pm^1 being 261/3, 28, 28, 29 in the former and 34, 32, 31 in the latter, etc., as the table shows. Thus the gap between C.l.laniger and C.l.coreanus far exceeds the gap between his so called C.l.rex and N.E.Siberian wolf. Sometimes north-eastern larger wolves may intrude into Corea over the frozen River Yalou, but such larger stragglers can neither be laniger nor nullify the existence of the peninsular form C.l.coreanus.
1 0 0 0 OA XXX 淡水巻貝の對光趨動知見補遺
1 0 0 0 OA XXXII 蝌蚪の生育に及ぼす光線及生活領域の影響
1 0 0 0 OA ドブネズミの下顎臼歯における附加結節について
A supplemental tubercle is often seen on the mesiobuccal part of the lamina on the lower molar of Rattus. We call this the mesiobuccal tubercle to distinguish it from the others. The main aim of this paper is to report on regional differences in its frequency of appearance on the mesiobuccal tubercle and to report on various supplemental tubercles on the lower molar of Rattus norvegicus. I. Regional difference: We have examined the regional difference of frequency of the appearance of the mesiobuccal tubercle in Rattus norvegicus, which were collected in the following four districts; Matsumoto City, Shiga Heights in Nagano Prefecture, Nagoya City and Fukuoka City. The most noticeable difference is found on the second lamina of the second molar. A quite significant difference is that the rate of frequency appearance on the right molar in Nagoya is 66.7%, which is far lower than the others; in Shiga Heights it is 91.7%, in Matsumoto City 95.1%, and in Fukuoka City 92.6%. On the second lamina of the third molar we recognize a regional difference, and especially the rate on the right molar in Nagoya, as well as that of the second lamina of the second molar, is much lower than the rate in the other three districts. II. Various supplemental tubercles which appear on the lower molar are as follows: 1) The supplemental tubercles found on the lingual surface between the first and the second lamina of the second molar. 2) The tubercle found on the distal surface of second lamina of the third molar. This tubercle is homologous to the posterior heel of the first and second molar and seems to be its remnant. 3) The tubercle found on the distobuccal of the first lamina of the first molar.
1 0 0 0 OA 食虫目およびツパイの歯の比較形態学的研究(分類・生態・形態)
1 0 0 0 OA 本州八ケ岳のネズミおよび食虫類 : 第1報 亜高山森林帶のネズミおよび食虫類
From April, 1962 to March, 1963, the authors collected small mammals (Rodentia and Insectivora) monthly by snap traps in the subalpine forest zone (Tsugadiversiforia-Abies Mariesii forest zone, alt. 1,300-2,400m) on Mt. Yatsugatake in Honshu. Total number of captured mice and voles was 961 with the following proportional breakdown: Rattus rattus 1, Apodemus speciosus 14, Apodemus argenteus 308, Clethrionomys andersoni 616, Anteliomys smithii 20, Microtus montebelli 2. The number of moles and shrews taken was 231 with the following breakdown: Euroscaptor mizura 1, Urotrichus talpoides hondonis 18, Dymecodon pilirostris 151, and Sorex shinto shinto 61. Rattus rattus and Microtus montebelli were found in this area. Apodemus speciosus and Urotrichus talpoides hondonis were only found in the lower part of this grassy area. On the other hand, Apodemus argenteus, Clethrionomys andersoni, Anteliomys smithii, Dymecodon pilirostris, Sorex shinto shinto were widely found in this forest zone. It was noted that the largest number of Apodemus argenteus appeared in spring, but the peak of Clethrionomys andersoni was seen from autumn to winter (Fig. 2). The average embryo sizes of each species were as follows: Apodemus speciosus 5.7, Apodemus argenteus 3.9, Clethrionomys andersoni 3.3, Anteliomys smithii 3.5, Microtus montebelli 3.0, Urotrichus talpoides hondonis 4.5, Dymecodon pilirostris 3.5, Sorex shinto shinto 3.7. The highest capture rate (number of captured small mammals/no. of set traps) occurred in October and the lowest rate in February. They reflect the effect of the population density and the snow fall, etc.