PLATE I. 



[All figures on this Plat* are of natural size.] 



Page 

 Fig. 1. Lunatia Gileadensis 14 



Front view. 



Fig. 2. Amauropsis Abeihensis 17 



2 a. Front view. 

 2 b. Dorsal view. 



Fig. 3. Amauropsis gradata 16 



Front view. 



Fig. 4. Tylostoma Birdanum 18 



Front view. 



Fig. 5. Amauropsis subcanaliculata 15 



Front view. 



Fig. (J. Tylostoma Syriacum Conrad sp 19 



6 a. Front view of cast. 



6 b. Top (posterior) view of same. 



Fig. 7. ? Tylostoma depressum Pictet and Campiche 21 



Front view of east. 



Fig. 8. Tylostoma induratum Conrad sp 22 



8 a. Left side view, oblique, showing aperture and perforated columella. 

 8 6. Right side view. A full dorsal view, which it was inteuded to give, would show 

 better the produced anterior. 



