23 



234 Ethalia supravallata Cpr . _ ; 

 San Diego. Not rare. 



235 FissureHa (Glyphis) aspera Esch. 

 Not common. San Diego. Sitka, Alaska. 



236 Fissurella (Glyphis) murina Cpr. 

 Not common. San Diego. 



[This is the Glyphis densiclathrata of Californian concholo- 

 gists, and for a time of Carpenter, but not of Reeve. D.] 



237 Fissurellidaea bimaculata Dall 

 San Diego. Rare. 



238 Clypidella (?) callomarginata Cpr 



Not common. 



[It is not certain that this is a Clypidella. D.] 



239 Acmaea mitra Esch 



Deep water; dead shells frequent. 



240 Acmaea insessa Hinds 



On algae, San Diego, Cal., and Todos Santos hay, Baja CaL 

 Santa Rosa Island, Cal. (Yates). 



241 Acmaea persona Esch. 



Abundant and very variable in form and color. Alaska, to 

 Socorro Island. 



242 Acmaea pelta Esch. var. 



A small elevated form is found beneath small stones imbedded 

 in sand near high-water mark on the shores of San Diego bay. 

 It is found in company with Chiton dentiens, Gld. and is not rare. 



243 Acmoea as mi Midd 



This very elevated little shell is found abundant on the shells 

 of Chlorostoma funebrale, which it closely resembles in color. 



244 Acmaea patina var. cuniingii Rve. 

 Less abundant than the other species. 



[This is nearly the southern limit of this form. D.] 



245 Acmaea scabra Nutt. 

 See 2396. 



246 Acmaea paleacea Gld 



Common on sea-grass outside the harbor at San Diego, and 

 also found at Todos Santos bay. 



247 Acmaea depicta Hds. 

 On sea-grass; not rare. 



248 Chiton (Leptochiton) nexus Cpr 



San Diego. 



249 Chiton (Trachydermon) dentiens Gld 



With Acmaea pelta, var. 



San Diego. [T. peudodentiens Cpr. D.] 



250 Chiton (Callochiton) fimbriates Cpr. 

 San Diego, Catalina Island. 



