TAB. XVII. 



Fig. 



1. Capulus obliquus, j?;r/^(? 156. 



a. view of exterior. 



b. view of interior. 



2. Capulus ungaricus, JO. 155. 



a. side \'iew, var. regularis. 



b. view of interior, var. unguis. 



c. view of exterior „ 



d. view of interior, var. \'ulgaris. 



e. view of exterior, same specimen. 

 /. var elata, side view. 



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

 muscular impression. 



3. Capulus militarisjj!;. 156. 



a. \\ew 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 fallaxjjy. 157. 



a. view of exterior. 



b. view of interior. 



