TAB. XVII. 



Fig. 



1. Capulus obliquus, j?;#ye 156. 



a. view of exterior. 



b. view of interior. 



2. Capulus ungaricus, jo. 155. 



a. side view, var. regularis. 



b. view of interior, var. unguis. 



c. view of exterior 



d. view of interior, var. vulgaris. 



e. view of exterior, same specimen. 

 /. var elata, side view. 



g. id. interior view of another specimen, showing the 

 muscular impression. 



3. Capulus militarise . 156. 



a. view of interior of var. partim-sinuosus. 



b. view of exterior of same specimen. 



c. internal view of a laterally compressed specimen. 



d. internal view of a laterally expanded specimen. 



e. lateral view of young specimen, the volution on a level 



with the base. 

 /. lateral view of an elevated specimen. 



4. Capulus fallax, j. 157. 



a. view of exterior. 



b. view of interior. 



