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Article type: Index
1961 Volume 21 Issue 4 Pages
Toc2-
Published: December 31, 1961
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Article type: Appendix
1961 Volume 21 Issue 4 Pages
App1-
Published: December 31, 1961
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Article type: Article
1961 Volume 21 Issue 4 Pages
355-357
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
357-358
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
358-359
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
359-360
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
360-361
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
362-363
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
363-364
Published: December 31, 1961
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Tokubei KURODA
Article type: Article
1961 Volume 21 Issue 4 Pages
365-388
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
388-
Published: December 31, 1961
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Kikutaro BABA
Article type: Article
1961 Volume 21 Issue 4 Pages
389-401
Published: December 31, 1961
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Akihiko INABA
Article type: Article
1961 Volume 21 Issue 4 Pages
402-413
Published: December 31, 1961
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Sadao KOSUGE
Article type: Article
1961 Volume 21 Issue 4 Pages
413-415
Published: December 31, 1961
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Tadashige HABE
Article type: Article
1961 Volume 21 Issue 4 Pages
416-431
Published: December 31, 1961
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Tadashige HABE
Article type: Article
1961 Volume 21 Issue 4 Pages
431-441
Published: December 31, 1961
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Katura OYAMA
Article type: Article
1961 Volume 21 Issue 4 Pages
442-462
Published: December 31, 1961
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Choe SANG, Yasuo OHSHIMA
Article type: Article
1961 Volume 21 Issue 4 Pages
462-476
Published: December 31, 1961
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Shigeo YOSHIBA
Article type: Article
1961 Volume 21 Issue 4 Pages
476-487
Published: December 31, 1961
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Vital observations on the atypical spermatozoa of Cipangopaludina and Semisulcospira, treated with acridine orange, were carried out under the fluorescence microscope. They moved actively emitting a beautiful fluorescence for a long time (Plates 25, 26). Results of the observations are summarized in Table 1. Atypical spermatozoa, at present, are considered to have no fertilization ability. However, one of their functions, if they should exist, is presumably concerned to their powerful motility. From the observations in this experiment, it may be easily supposed that they might be helpful for the typical spermatozoa to be brought together with them in the female genital duct after the copulation.
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Shoji FUJII
Article type: Article
1961 Volume 21 Issue 4 Pages
488-499
Published: December 31, 1961
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This paper deals with taxonomic and palaeontological studies of Anadara kakehataensis and its allies. The results are summarized as follows : 1. The specimens described as Anadara kurosedaniensis agree morphologically with the junior form of Anadara kakehataensis, so that the former is regarded as a synonym of the latter. 2. A. kakehataensis is not referable to Anadara but to Scapharca as to its subgenus. 3. Although the junior form of A. daitokudoensis is closely related to that of A. kakehataensis, A. daitokudoensis is distinct from A. kakehataensis in the shape of posterior slope and in the difference of number of rib, as far as the present specimens are concerned. 4. A. kakehataensis and its allies are found always associated with such shells as Vicarya, the dwellers of black mud in embayment under warm current. 5. They are classified into three types : A. daitokudoensis type, medium type (Yatsuo, Ayukawa) aud large type (Tokunari) of A. kakehataensis. Their junior forms have a similar shell to each other. They can be divisible only in adult form. This fact suggests that their form is the best adapted one to individual embayment which has different nutrition owing to it marine conditions.
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Tokio SHIKAMA
Article type: Article
1961 Volume 21 Issue 4 Pages
500-_506-2_
Published: December 31, 1961
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Tokio SHIKAMA
Article type: Article
1961 Volume 21 Issue 4 Pages
507-_510-1_
Published: December 31, 1961
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Yoshio KOJIMA
Article type: Article
1961 Volume 21 Issue 4 Pages
511-515
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
516-517
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
517-
Published: December 31, 1961
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[in Japanese]
Article type: Article
1961 Volume 21 Issue 4 Pages
517-518
Published: December 31, 1961
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Article type: Article
1961 Volume 21 Issue 4 Pages
518-
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Article type: Article
1961 Volume 21 Issue 4 Pages
519-
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Article type: Article
1961 Volume 21 Issue 4 Pages
519-521
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Article type: Article
1961 Volume 21 Issue 4 Pages
521-522
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Article type: Article
1961 Volume 21 Issue 4 Pages
522-
Published: December 31, 1961
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Article type: Article
1961 Volume 21 Issue 4 Pages
522-525
Published: December 31, 1961
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