40 Plectodon scaber Cpr. 

 Catalina I. 4060 fms., 2 valves only. 



41 Solen sicarius Gkl. 



Str. Fuca to San Pedro Japan. 



42 Solen rosaceus Cpr. 

 Santa Barbara to San Diego. 



43 Solecurtus Californianus Com. 

 Santa Barbara to San Diego. 



44 Solecurtus subteres Com: 



Santa Barbara to San Diego \= Californianus 1) 



45 Machsera patula Dixon. 



Str. Fuca to San Diego Kamtschatka, Japan. 



46 Sanguinolaria Nuttalli Conr. 

 Santa Barbara to San Diego Japan. 



47 Psammobia rubroradiata Com: 

 Str. Fuca to San Diego Sitka. 



48 Macoma secta Conr. 

 -Baulines Bay to San Diego Japan ? 



49 Macoma edulis Nutt. 



Str. Fuca to Baul's Bay Japan ? (secta var ?) 



50 Macoma indentata Cpr. 

 Monterey; (to San Diego ?) 



51 Macoma yoldiformis Cpr. 



Str. Fuca to San Pedro. 



52 Macoma nasuta Conr. 



Str. Fuca to San Diego Kamtschatka. 



53 Macoma inquinata Desk. 

 Str. Fuca to Monterey. Estuaries. 



54 Macoma edentula Br. $ Sly. 

 Str. Fuca ! Behring's Str. to Japan. 



55 Macoma expansa Cpr. 



Str. Fuca. (=lata Desk, var'?) 



56 Macoma inconspicua Br. $- Sby. 

 Str. Fuca to Santa Barbara Arctic. 



57 Mera modesta Cpr. 

 Str. Fuca. 



58 Mera. obtusa Cpr. 



Str. Fuca to San Diego. (=modesta var ?) 



59 Mera variegata Cpr. 



Str. Fuca to Catalina I. Bch 120 fms. 



60 Mera Gouldii Hani. 



San Diego Cerros Is., Lower Cal. 



61 Mera salmonea Cpr. 



Str. Fuca to Monterey. Bch. to 20 fms. 



