2 0 0 0 エビ, カニの煮ると赤くなる理由
1 0 0 0 OA 爬蟲類の分類に就て(第1回)
- 著者
- Osborn,Henry Fairfield
- 出版者
- 東京動物學會
- 雑誌
- 動物学雑誌
- 巻号頁・発行日
- vol.16, no.192, 1904-10-15
1 0 0 0 OA 爬蟲類の分類に就て(第二回)
- 著者
- Osborn,Henry Fairfield
- 出版者
- 東京動物學會
- 雑誌
- 動物学雑誌
- 巻号頁・発行日
- vol.16, no.194, 1904-12-15
- 著者
- Momiyama,Toku T.
- 出版者
- 東京動物學會
- 雑誌
- 動物学雑誌
- 巻号頁・発行日
- vol.52, no.11, 1940-11-15
1 0 0 0 OA フナムシの体色変化の日周期性(内分泌)
1 0 0 0 OA ゲジの発育段階
The author tried to breed a Japanese house centipede, Thereuonema hilgendorfi Verhoeff and examined its postembryonic development on the basis of the passed number of molting. 1. The eggs are creamy yellow, subspherical, and covered with microscopic hairs which are helpful to moisten rapidly the surface of eggs by a little water in the soil. Each egg has a diameter of 1mm and the length of 1.2mm, its shell being about 40μ tick. All eggs are not laid in masses. The embryos bear four pairs of legs, four tergits and two zonular tergits of maxillary segments and prehensors. Their eyes are pigmented compound. 2. The six larval stadia, as summarized in Table 1, can be distinguished by differences in pairs of legs. Larvae of each stadium bear the embryonic tergits, sternits and limb buds on the mesodermic somite. After the sixth molting, larvae come into Agenitalis-stadium. 3. The epimorphic developmental period is divided into six stadia and these have the relation to the passed number of molting as follows: No. of molting Body size Agenitalis I: 6 7.5-9.0mm. length Agenitalis II: 7 8.5-10.5mm. length Immaturus: 8 10.5-13mm. length Praematurus: 9 11.5-14.5mm. length Pseudomaturus: from 10 to 12 12-20mm. length Maturus: from 13 to 17 19-28mm. length 4. The Hemianamorphic development of T. hilgendorfi is divided into twelve stadia. Of those stadia, Pseudomaturus and Maturus pass through three and five times moltings respectively, while the others one molting.
1 0 0 0 OA 日本産普通多足類の後胚発生 : II.カマクラオオゲジ
1) The hemianamorphic development of the Japanese house centipide, Thereuopoda ferox VERH., is divided into eleven or twelve growing stadia which have the morphological characters as are shown in Table 1. 2) Adult bears numerous spines on each segment of legs and on the flagellum primum of antennae. Growth of spines has relations to growing stadia as shown in Table 2.
1 0 0 0 OA ヘビの冬眠場所の発掘(生態)
1 0 0 0 OA 日本産普通多足類の後胚発生 : I.ゲジにおける有歩肢胴節の改形的発育とその背板の問題
Several reports concerning the tergite of Scutigeridae have already been published since the old study of Latzel (1880). This paper gives a new aspect on the tergite. The materials used for the observation are the two following species, Thereuonema hilgendorfi Verhoeff and Thereuopoda ferox Verh. The results obtained are as follows: 1.Scutigeridae has a small covered tergite between any comsecutive two of eight main tergites. If these seven small tergites are regarded to be the modification of the main tergites, the tergites of the family are fifteen in number and this number coincides with that of the pairs of legs. (see Figs. 1-4) 2.The earlier workers except Verhoeff made a common error which denied the presence of a small covered tergite between the seventh and the eighth main tergite because of seeing Scutigefidae in a relation to Lithobiidae. Attems ('30) has mistaken a pretergite as a small covered tergite. 3.The anamorphic development of leg-bearing segments is summarized in the Table 1. So far as the present writer has observed, there is found no foundation of Verhoeff's theory that the main tergite of Scutigeridae is a diplotergite. It is considered that the eight main tergites belong to the odd leg-bearing segments, and that each of the even segments has a small covered tergite. These small tergites appear at the epimorphic development period. 4.In the Table 1, doubly marked tergites have the following characteristic: each of them is a normally complished tergite at the earlier stage of the stadium, but at the later stage it turns into a cuticula by partial moulting which occurs before the change of larval stadia. This is thought to be an organic phenomenon for the formation of the two new pairs of legs in the embryonic somite. As compared with each other between Verhoeff's Table and the present writer's, it is likely that the former has considered this characteristic process as a change of teloptergite into diplotergite. 5.The "Telotergite" called by Verhoeff means the embryonic tergite at the first and the second larval stadium and also means the complished tergite, which turns into cuticula as mentioned above, at the other stadia. Thus, it must be said that he put heterogenous tergites in the same category.