1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 543 

 Haliotis corrugata Gray. 



Apparently a deeper water species ; not common. 



Ethalia supravallata Cpr. 



San Diego. Not rare. 

 Fissurella volcano Eve. 



This is found larger and more numerous at Todos Santos Bay than 

 in the vicinity of San Diego, where it is also abundant. 



Fissurella (G-lyphis) aspera Esch. 



Not common. San Diego. 

 Fissurella (Glyphis) murina Cpr. 



Not common. San Diego. 



[This is the Glyphis densiclathrata of Californian conchologists, and 

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



Lucapina crenulata Sby. 



This great species is not rarely found on the rocky ocean beaches, in 

 pools, or among the sea- grass with Aplysia Calif ornica Cp. 

 [Very young specimens are of a lurid pink. D.J 



Fissurellidaea bimaculata Dall. 

 San Diego. Eare. 



Clypidella (?) callomarginata Cpr. 

 Not common. 

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



Acmaea mitra Esch. 



Deep water ; dead shells frequent. 



Acmaea insessa Hinds. 

 On algSB. 



Acmaea persona Esch. 



Abundant and very variable in form and color. 



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. 



Acmaea asmi Midd. 



This very elevated little shell is found abundant on the shells of 

 Chlorostoma funebrale, which it closely resembles in color. 



Acmaea spectrum Nutt. 



An abundant species, very variable in form. 



Acmaea patina var. cumingii Rve. 



Less abundant than the other species. 



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



Acmaea scabra Nutt. 



The more common species at San Diego, also found at Todos Santos 

 Bay. 



[Sometimes beautifully mottled like pi7itadina Gld. D.J 



