1885.] PEOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 535 



CEPHALOPODA. 



Octopus punctatus Gabb. 



Common on rocky beaches. 



GASTROPODA. 



Murez trialatus Sby. 



Eocky beaches, rare at San Diego, more common south. Varies in 

 color from pure white to brown, often banded. 

 Cerostoma nuttallii Conr. 



Eocky beaches, abundant and very variable in form and color. The 

 pure white, olivaceous, banded and brown varieties are distinctly and 

 prettily marked. Also at Todos Santos Bay. 

 Muricidea barbarensis Gabb. 



A very large and old specimen of this was found on the ocean side of 

 Point Loma, inhabited by a hermit crab. 

 Muricidea incisa Brod. 



Eare, occasionally found near low-water mark. 

 Pteronotus festivus Hinds. 



Abundant at False Bay, La Playa, and Todos Santos Bay, among 

 small, angular boulders. 

 Ocinebra subangulata Stearns. 



A live individual washed ashore on a piece of kelp, found on the ocean 

 side of the San Diego peninsula, is now in the collection of the Phil- 

 Acad. Sci. 

 Ocinebra interfossa Cpr, 



Under rocks partially imbedded in shell sand, rocky beaches, with the 

 following species : 

 Ocinebra gracillima Stearns. 



Under stones, on stony beaches. San Diego. 



Ocinebra interlirata Stearns. 



San Diego. Eare. 

 Ocinebra poulsonii Nutt. 



Equally abundant and in similar situations with Iteronotus fesUvus^ 

 Hds. Also at Todos Santos Bay. 



Purpura saxicola Val. 



Abundant on a rocky beach just south of the boundary line, but not 

 noticed on other ocean beaches either at San Diego or All Saints Bay. 

 Purpura biserialis Blainv. 



A single living specimen from the beach north of False Bay, near La 

 Hoya. 



[This is the most northern locality known for this species. The spec- 

 imen is large and fine. D.J 

 Monoceros lugubre Sby. 



Abundant at Todos Santos Bay and north to near the United States 

 line. Light-colored individuals were found of a shade of yellow ochre, 

 merging to white. 



