27 
283 Schizothaerus nuttallii Conr 
San Diego; Todos Santos bay. Kodiak Island, Alaska. Japan. 
284 Pandora (Clidiophora) punctata Cpr 
Single valves often washed ashore on sandy beaches. 
285 Thracia curta Conr 
Not rarely found imbedded in rocks; San Diego. Santa Rosa 
Island (Yates). 
286 Thracia plicata ? Desh 
Numerous dead shells of this are washed up on the shores of 
San Diego bay, with Lyonsia Californica and other bivalves. 
[Described from Southern fauna, but in absence of a larger 
series the identification is not dogmatic. D.) 
287 Entodesma scammonii Dall 
One example found with the above species. 
288 Mactra planulata Conr 
Ocean beaches; not found abundantly. Also Todos Santos bay, 
289 Mactra falcata Gld 
Not found abundantly. 
[Belongs to Northern fauna. D.] 
290 Semele rupium Sby. 
This abounds on the rocky ocean beaches, but rarely collected 
alive. 
291 #£=Lutricola alta Conr 
Not plentiful. 
292 (£dalina subdiaphana Cpr 
Bay shores; abundant, San Diego, Vancouver Isl. 
923 Cooperella scintillzeformis Cpr. 
With the last; rarer. 
294 Cumingia californica Conr 
La Playa; abundant in dead bivalves or in holes. Todos San- 
tos bay. 
295 Psammobia rubroradiata Nutt 
(See 2905.) Avatcha Bay, Kamchatka. (Dall.) 
296 Tellina Bodegensis Hds 
Not plentiful; San Diego. 
297 Tellina Gouldii Hanl 
Abundant; San Diego bay. Also Todos Santos bay. 
298 Macoma secta Conr. 
Plentiful at times, as also indentata and inquinata. 
299 Macoma inquinata Desh 
300 = Petricola carditoides Conr 
San Diego; not numerous; burrows in soft rock the length 
of its shell. 
