38 THE NAUTILUS. 



Margarita pupilla Gld. Several. 



* Margarita optabilis knechti, Arnold. One specimen. 



* Calliostoma canaliculatum Mart. Several juv. 

 Leptotbyra bacula Cpr. Not rare. 



* Leptotbyra carpenteri Pils. Not rare. 

 Leptotbyra paucicostata Dall. Not rare. 



* Acmaea mitra Esch, Two juv. 



* Acmaea (sp.). One juv. 



Natica clausa B. and S. Young specimen and opercula. 



Crepidula navicelloides Nutt. One specimen. 



Crepidula adunca Sby. Two examples. 



Rissoa acutilirata Cpr. Two specimens. 



*Rissoa (sp?). One example. 



*Diala marmorea Cpr. Several. 



Lacuna compacta Cpr. The most abundant form. 



Bittium asperum Gabb. Common. 



Bittium (quadrifilatum Cpr.?). Common. 



Bittium (sp.). Common. 



*Epitonium (Opalia) borealis Gld, One specimen. 



Ocinebra perita Hds. Several. 



*Ocinebra interfossa Cpr. One specimen. 



*Ocinebra lurida Midd. var. tending toward Carpenter's var, 

 munda. Several. 



♦Ocinebra (sp.). One specimen. 



Boreotrophon gracilis Perry. One example. 



*Boreotrophon stuarti Smitb. One example. 



*Boreotrophon stuarti praecursor Arnold. Several. 



Amphissa corrugata Rve. Common. 



Columbella tuberosa Cpr. Common. 



*Nassa mendica cooperi Fbs. One example. 



Fusus robustus Trask ? One example. 



Fusus (sp.). Several. 



*Mitramorpba filosa intermedia Arnold. 



\_Note : This form was likewise found in a living condition by the 

 writer at Pacific Grove, Cal., in April, 1908.] 



Clathurella conradiana Gabb. Two specimens. 



"^Tornatina cerealis Gld. Two examples. 



♦Dentalium indianorum Cpr. One perfect adult specimen. 



*Psephidea (ovalis Dall ?). One valve. 



