PLATE III. 



Page 



Fig. 1. Actseonina vafra 29 



1 a. Front view. 



1 6. Left side view, showing umbilical chink. 



A full dorsal view would better show the sudden anterior contraction of the body- 

 whorl. 



Fig. 2. Actaeonina brevis Morris and Ltcett 32 



2 a. Front view of the original type specimen. Natural size. 



2 b. Front view of the same specimen. ) , 



„ .. , . . . . .7 r Enlarged two diameters. 



2 c. lop (posterior) view ot the same. ) " 



Fig. 3. Colostracon sinuatum ............. 33 



3 ii. Front view. Natural size. 



3 6. Front view of same specimen. ) _ , 



> Enlarged two diameters. 



3 c. Top (posterior) view of same. 



Fig. 4. Colostracon curtum 34 



4 a. Front view. Natural size. 

 4 b. Front view of same specimen. "\ 



4 c. Dorsal view of same. J- Enlarged two diameters. 



4 d. Top (posterior) view of same. ) 



Fig. 5. Colostracon Lewisii Fraas 35 



Fraas's figures reproduced. 



About the natural size. 



5 a. Front view of type specimen. ") 

 5 b. Top (posterior) view of same. ) 



Fig. 6. Melo pervetus Conrad sp. 35 



Dorsal view of cast, nearly entire. Natural size. 



Fig. 7. Cardium (Acanthocardia) Syriacum Conrad sp 48 



7 a. Left side view of cast. ) 



7 b. Posterior view of same. > Natural size. 



7 c. Anterior view of same. ) 



Fig. 8. Hippurites Lewisii Fraas 54 



View of flatter side of a well-preserved lower valve. Natural size. 



Note. — The wood-cut of Cerithium ffracilens, p. 3G, represents, in natural size, an imperfect specimen, partially 

 restored by means of smaller specimens which retain features obscured in the original of the figure. The row of indistinct 

 tubercles on the base of the last whorl was overlooked by the artist. 



