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THE 



ZOOLOGICAL MAGAZINE 



Organ 

 of the ZOOLOGICAL SOCIETY of Tokyo. 



Vol. XIV. 



No 162. 



CONTENTS. 



PAGK 



One of the Eeasons why Man is strong in the Struggle for 



Existence. By Prof. Mitsukuri 1 



On a double-headed Tortoise. By H. Kuwano 3 



On Japanese Molluscs {Lamillibranchs I). By S. Yoshiwaea. ... 23 

 The Fish Fauna of Japan, with Observation on the Geographical 



Distribution. (IV). Translated by K. Takahasht 27 



On Japanese Crabs (IV)- By T. Terasaki 31 



Notes: — Immigration of Birds into the Aizu District — Butterflies 

 collected in the Mikage Begion — Ptorius e ruminia ionn^ in Kusatsu, 

 Province of Kdtsuke — On the Function of the Adrenal Gland — 

 Effect of Calcium sulphate on the Body of the Oyster — On the 

 Spariclse of Japan — Annotationes Zoologicae Japonensis IV, Part 

 2.—" Neurologia "—A Letter from Mr. Yatsu— Mr. T. Nishi- 

 kawa — Proceedings of the Natural History Society in Kyoto — 

 Proceedings of the Zoological society of Tokyo. 



Notice. The Zoological Magazine is publisht'd monthly. 



The subscription pi-ice for Europe and Auiericii, is 3 Yen per iinnuiu. 



All letters and comuumicatioas to be addressed to the ZOOLOGICAL SOCIETY OF 

 TOKYO, Zoological Institute, Science College, Imperial University, Tokyo, .Tapau. 



TOKYO 



3F»-ci.Tt>l±sla.e»ca. Toy -tli-e E;iE:iC3-'5£roS3Ea:-A., 



April iy02 



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