Description of the Species. 

 Mollusca. 



Gastrcpoda-Prosobranchiata, 

 Order Pectinibranchiata. 



mURICID/E. 



7. MUREX FALCATUS Sow. 



PI. I. Fig. 1. 



Tryox, Man. Couch., p. 127. — Proc. Zool. Soc, 1879, p. 181. 

 Synonym. — M. aduncus Sow.; M. aeanthopliorus A. Ad. 



Shinagawa (frequent). 



Living: Hakodate (Hokkaido), Tsusaki, Sumoto (Awaji), 

 Gotö-Islands, Kii, Kagoshima and Misaki (Sagarai). 



2. MUREX LONGICANALIS Tok. 

 PI. I. Fig. 2. 



Shell small, spiral, fusiform ; whorls five, convex, crossed 

 by numerous fine transverse striations ; varices on each whorl 

 nodulous, but not spinous ; aperture oval, canal very long. 

 Height 19"'"^ ; breadth 9™™. 



Shinagawa (rare). 



S. TROPHON EXIGUUS Tok. 

 PI. I. Fig. 3. 



Shell fusiform, liut more broadly ovate than in the two 

 preceding species; spire prominent; whorls with numerous, sharp, 

 laminated varices, the interstices spirally ribbed; aperture ovate; 

 canal open. 



