OF WEST COAST MOLLUSCA. 23 



436 Trachydermon Nuttallii Cpr. 

 Str. Fuca to Monterey. 



437 Trachydermon flectens Cpr. 

 Str. Fuca to San Diego. 



438 Callochiton fimbriatus Cpr., (Mss.) 

 Catalina (or other?) I., Cal. 



439 Leptochiton nexus Cpr. 

 Catalina L, Cal. 



440 Acanthochites avicula Cpr. 

 Monterey ? Catalina I. 8 20 fms. 



441 Nacella instabilis Gld. 

 Str. Fuca to Monterey. 



442 Nacella insessa Hds. 

 Baulines Bay to San Diego. 



443 Nacella subspiralis Cpr. 

 Catalina I. 610 fms. 



444 Nacella depicta Hds. 

 Santa Barbara to San Diego. 



445 Nacella paleacea Gld. 

 Monterey to Santa Barbara. 



446 Nacella triangularis Cpr. 

 Baulines Bay to Monterey. 



447 Tylodina fungina Gabb. 

 Barbara I., Cal. 



448 Acmsea patina Esch. 



Str. Fuca to San Diego Mazatlan Sitka. 



449 Acmaea pelta Esch. 



Str. Fuca to San Diego Sitka. 



450 Acmsea pelta var. Asmi Midd. 

 Baulines Bay to Monterey Sitka ? 



451 Acmsea persona Esch. 



Str. Fuca to San Diego Mazatlan Sitka. 



452 Acmsea scabra Nutt. 



Baulines Bay to San Diego Mazatlan. 



453 Acmsea spectrum Nutt. 

 Cape Mendocino to San Diego. 



454 Acmsea pileolus Midd. 

 Sitka. 



455 Acmsea pileolus var. ? rosacea Cpr. 



Monterey to Santa Barbara. 



456 Lottia gigantea Gray. (Sby.?) 

 Farallone Is. to San Diego S. A. ? 



457 Scurria mitra Esch. 



Str. Fuca to San Diego Sitka. 



