188 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



PLATE 29 



Fig. la. Semele reagani, new species, X2. Type. 



Fig. lb. Semele reagani, new species, X2. Hinge view of type. 



Fig. Ic. Semele reagani, new species, X2. Cotype. 



Fig. Id. Semele reagani, new species, X2. 



Fig. 2a. Semele gayi Arnold, X3. 



Fig. 2b. Semele gayi Arnold, X3. 



Fig. 3a. Tellina obruta Conrad, X2. 



Fig. 3b. Tellina obruta Conrad, X2. Hinge view. 



Fig. 4. Tellina oregonensis Conrad, X2. 



Fig. Sa. Saxicava arnoldi, new species, X2. Umbone view of type. 



Fig. 5b. Saxicava arnoldi, new species, X2. 



Fig. 6a. Cardium lincolnensis Weaver, X2. 



Fig. 6b. Cardium lincolnensis Weaver, X3. 



Fig. 7. Lucina, species, X3. 



Fig. 8. Diplodonta dalli, new species, Xl- 



Fig. 9. Diplodonta, species, X2. 



Fig. 10. Chama pacifica, new species, X2. 



Fig. 11. Lima bella, new species, X2. 



Fig. 12a. Actseon parvum, new species, X3. Type. 



Fig. 12b. Actaeon parvum, new species, X3. 



Fig. 13. Epitonium condoni Dall, XL 



