PLATE III. 



Pace 

 Fig. 1. Actseonina vafra 29 



1 a. Front view. 



1 b. Left side view, showing umbilical chink. 



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

 whorl. 



Fig. 2. Actaeonina brevia Morris and Ltcett 32 



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



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



,^ , . . , . .J: y Enlarged two diameters. 



2 c. iop (po.stenor) view oi the same. ) " 



Fig. 3. Colostracon sinuatum 33 



3a. Front view. Natur.al size. 



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



„ m ^ 1 • V • r r Enlarged two diameters. 



•i c. 1 op (posterior) view ol 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. [■ Enlarged two diameters. 



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



Fig. 5. Colostracon Lewisii Fraas 35 



Fraas's figures reproduced. 



5 a. Front view of t3'pe specimen. ) . , , , . 

 ,, ™ / ^  ^  r r About the natural size. 

 5 b. lop (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, 'i 



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



7 c. Anterior view of same. ) 



Fig. 8. Hippurites Lew^isU Fraas 54 



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



Note. — The wood-cut of Cerithium grnciUns, p. .36, represent.^, 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. 



