mala PROCEEDINGS OF THE NATIONAL MUSEUM. 2038 
Family CALYPTRAEID, 
Genus CRUCIBULUM Schumacher. 
Crucibulum imbricatum Brod. (C. scutellatum Gray, of Cooper Geographical Cata- 
logue). 
One in a collection of shells found on Santa Catalina Island, and two 
found in San Pedro Bay. From southern fauna. 
Crucibulum spinosum Sby. 
Washed ashore in the drift. Young ones found alive on Pecten 
equisuleatus. Plentiful alive, at very low tide in the oyster bed at San 
Pedro. 
Genus CREPIDULA Lam.. 
Crepidula aculeata Gmel. 
One or two reported. 
Crepidula adunca Sby. 
A few found living. 
Crepidula dorsata Brod. 
Not rare; these shells vary much in color and habit. 
Crepidula excavata Brod. 
Shells with the soft parts gone are sometimes found in the drift. 
“Does not exactly agree with any of our shells, but is probably this.” 
(GC. T.-8:;) 
Crepidula explanata Gld. (C. exuviata Nutt.). 
Three or four, found by two or three collectors. 
Crepidula navicelloides Nutt. 
Plentiful in dead gastropods. 
Crepidula onyx Sby. var. rugosa Nutt. 
- Plentiful, often in clusters, one on another, and variable in shape. 1 
have one old beach-worn example, of which the outline on one side 
describes a semicircle. Shells found on Norrisia are of a light ma- 
genta-pink in the interior. The form of the septum, or deck, of the pink, 
shells that I have seen varies from that of the var. rugosa. 
Genus GALERUS (Humphr.) Gray. 
Galerus mammillaris Brod. (G. fastigiatus Gld., perhaps G. contortus Cpr.). 
Two found dead at Long Beach. (C. T. 8.) 
