CONTENTS: 



I. Über das Blutgefässsystern der Hirudineeu. 



Von Asajiro Oka, Tokyo 4U 



II. The Salmon and Trout of Japan. 



By David Starr Jordan 61 



III. On the Habits of the Japanese Lingula. 



By Naohidé Yatsu : 69 



IV. On a new Enteropneust from Misaki, Balanoglossus misa- 

 kiensis n. sp. 



By Hisato Kuwano 77 



