194 SHELLS OF LOWER CALIFOBNIA— STEARNS. volxvii. 



Island, commou on beach, Albatross; San Juanico; Galapagos Islands, 

 and coasts of Ecuador and Peru. 



A dark brown specimen of this line species, 0.80 inch in len th from 

 the first locality. The collection contains examples which measure 

 2.39 inches long. In such large specimens the sculpture is very strong 

 and the somewhat irregular radiating ribs are proportionately more 

 conspicuous than in small specimens; in the latter, however, the details 

 of the finer, wrinkled sculpture are more distinct. A great number of 

 synonyms have been made that I will not here repeat, but refer to Car- 

 penter's Mazatlan Catalogue, p. 287, and to my paper on the Galapagos 

 {Albatross) shells, in the Proceedings, U. S. National Museum, 1893, 

 Vol. XVI, 398 et seq. 



CRUCIBULUM SPINOSUM, Sowerby. 



Common (No. 60229, U. S. N. M.). 



Tres Marias; Loreto; common everywhere. Santa Margarita Island, 

 common on beach, Albatross. From Monterey, Oak, to Peru, and in the 

 Galapagos Islands this species is found; it is a generally and widely 

 distributed form. 



CREPIDULA UNC4UIF()RMIS, Lamaifk. 



Common. 



Tres Marias (No. 12185, U. S. N. M.) ; La Paz (No. 12497, U. S. N. M.) ; 

 Captain Forrer. 



Particularly flue examples from the inside of the mouth of Oliva 

 venulata. 



CREPIDULA DORSATA, Brod.; var. LIGULATA, (i o u ] d . 



One example. Tres Marias (No. 60259, U. S. N. M.); frequent in the 

 Gulf at many places. 



CREPIDULA RUGOSA, Nutt all-Reeve. 



Two specimens. Altata (No. 12496, U. S. N. M.). The above is ob- 

 ably a varietal aspect of Sowerby's Crepidula onyx. 



GALERUS MAMILLARIS, Brod e rip. 



One example from each place. 



Tres Marias (No. 60253, U. S. N. M.); Altata (No. 60255, U. S. N. M.). 

 Recently detected at Long Beach, on the coast of Los Angeles County, 

 Cal. 



Family A m A l t h k i d ^ . 



AMALTHEA BARBATA, Sowerby. 



Two specimens. 



