EXPLANATION OF PLATE 2 



Fig. la. Macrocallista densa, n.sp. Internal view of right valve. X 2. 



Fig. lb. Macrocallista densa, n.sp. External view of right valve, x 2. 



Fig. 2a. Pecten levis, n.sp. External view of right valve, x 2. 



Fig. 2b. Pecten levis, n.sp. Internal view of right valve, x 2. 



Fig. 2c. Pecten levis, n.sp. External view of left valve, x 2. 



Fig. 2d. Pecten levis, n.sp. Internal view of left valve, x 2. 



Fig. 3. Clirysodomus rectirostris (Carpenter), x 1.5. 



Fig. 4a. Corbula tenuis, n.sp. Internal view of right valve, of type spec 

 en. x 3. 



Fig. 4J>. Corbula tenuis, n.sp. External view of left valve, cotype. x 3. 



Fig. 5a. Cancellaria crawfordiana Dall, front view, x 2. 



Fig. 5b. Cancellaria crawfordiana Dall, back view, x 2. 



Fig. 6. Natica orbicularis Nomland. Natural size. 



Fig. la. Turris mercedensis (Martin), back view, x 2. 



Fig. 7b. Turris mercedensis (Martin), front view, x 2. 



LG2| 



