Collected by Robert E. C. Stearns. 



Terebratella caurina, GId. 



Near San Francisco, California. 

 Collected by Uobert E. C. Stearns. 



Pholadidea pcnita, Cottr. 



Monterey, California. 

 Collected by Robert E. C. Stearns. 



Pholadidea ovoidea, GIJ. 



Monterey, California. 

 Collected by Robert E. C. Stearns. 



Netastomella Darwinii, ^7///. 



Monterey, California, 



Collected by Robert E. C. Stearns. 



Parapholas Califoniica, Conr 



Monterey, California. 

 Collected by Robert E. C. Stearns. 



Saxicava pholadis, Linn. 



Monterey, California. 

 Collected by Robert E. C. Stearn.s. 



Platyodon cancellatum, Conr. 



Half Moon Bay, California. 

 Collected by Robert E. C. Stearns. 



Cryptomya Califoniica, Conr. 



San Francisco Bay, California. 

 Collected by Robert E. C. Stearns. 



Lyonsia Califoniica, Conr. 



Piuissima, California. 

 Collected by Robert E. C. Stearns. 



Macliscra patula, Divon. 



Santa Cruz, California. 

 Collected by Robert E. C. Stearns. 



Macoma secta, Conr. 



Bodega Bay, California. 



Collected by Robert E. C. Stearns. 



Macoma nasuta, Conr. 



Bodega Bay, California. 



Collected by Robert E. C. Stearns. 



Macoma iiicoiispicua, Br. Sf Shy. 



San Francisco Bay, Calilbrnia. 

 Collected by Robert E. C. Stearns. 



Cumiiigia Califoniica, Conr. 



Monterey, California, 

 Collected by Robert E. C. Stearns. 



Doiiax Califoniiciis, Conr. 



San Diego, California. 



Collected by Robert E. C. Stearns. 



Amiantis callosa, Conr. 



San Diego, California. 



Collected by Robert E. C. Stearns. 



Pachydesma crassatelloides, 



San Diego, California. \Conr. 

 Collected by Robert E. C. Stearns. 



Psephis tantilla. Old. 



Monterey, California. 

 Collected by Robert E. C. Stearns. 



Chione simillima, Shij. 



San Diego, California. 

 Collected by Robert E. C, Stearns. 



Chione fluctifraga, Shy. 



San Diego, California. 

 Collected by Robert E. C. Stearns. 



Tapes staminea, Canr. 



California, 

 Collected by Robert E. C. Stearns. 



Tapes staminea, var. Petitii, 



i California. [Desh. 



Collected by Robert E. C. Stearns. 



Tapes staminea, var. ruderata, 



California. ^Desh. 



Collected by Robert E. C. Stearns. 



Tapes staminea, var. diversa, 



Tomales Bay, California. 1"*^^^. 



