Plate V. 



(All the specimens, here figured, are in Sei. ColL Mus.) 

 Helicoceras vemtstiim m. Pp. 11-12. 



Fig. 1. Upper view of the type. From Pachydiscu.s-heds of the Sanushibe^ 



Iburi Prov. Nat. size. 

 Fig. 2. Diagram of a suture line, drawn from the same specimen. s. 



si phonal line. x 4. 



Desmoveras Daicsoni Whiteaves var. japonica. Pp. 35-39. 



Figs. 3 a, b. Side and front views of the type from the Thetis-zone of 



tlie Ikushumbets. Nat. size. 

 Fig. 4. Diagram of a suture line, drawn from another specimen. Nat. size.. 



Hauericeras anriiistum m. Pp. 33-3.3. 



Figs. 5 a, b. Side and front views of the type. From the Upper Am- 

 monite-beds of Ikandai, near Urakawa. Nat. size. 



Fig. 6. Diagram of a suture line, drawn from the same specimen, g. 

 siphonal line; u. m. umbilical margin, x 4. 



