CEPHALOPODA FROM THE HOKKAIDO. 51 



The reason wliy tlie writer hesitates to identify the Japanese 

 form witli T. epigonus lies in the fact that his specimens are all 

 in a young stage, and that there is none which clearly shows the 

 suture line. 



Distinguished from T. popetensk by the higher and broader 

 whorls and the narrower umbilicus ; from T. sphaeronoius and T. 

 glabrus hy the lower whorl and the wider umbilicus. T. crciësus, 

 on the other hand, is distinguished by its broader whorls. 



Localities : — The Penke-kenebets and the Kenekawen-opirau- 

 shibets, both branches of the Opiraushibets, and the Abeshinai, a 

 tributary of the Teshiogawa. Five specimens have been examined. 



Horizon : — fScaphites-heds. 



Foreign Localities of T. eplgonun : — U[)per Trichinopoly group 

 of S. India and h'enonian of Tunis." 



■r^-^^r^r 



-1) L.-'T'ervinqui EKE: Sur un ■ Facies particulier du yénuuieu tlu Tunisie. 1898. 



