1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 189 



Albatross. This form is rather common in the Gulf of California region, 

 but really flue exainples are rare. 



ONISCIDIA TUBERCULOSA, Reeve. 



One example. Tres Marias (No. 47143, IT. S. N. M.). 

 A common form in the Gulf region. Occurs also in the Galapagos 

 Islands. 



Family Doltidje. 



DOLIUM (MALEA) RINGENS, Swaiuson. 



One perfect example; many fragments. 



Sta. Margarita Island, Albatross. The above example, though only 

 If inches long, is mature. This species is apparently common at this 

 place. It has been reported from the Galapagos Islands. 



Family C y p r .5^] i d yE . 



CYPR^A (LUPONIA) ISABELLA-MEXICANA, Stearns. 



Lupoitia Isahella-Mexicana, Stearns, Proc. U. S. Nat. Mas. 1893, pp. 348-349, 

 fig. 5, pi. 50. :=C. confrovcrm, Gray, Steaijns, in Proc. Phila. Acad. Nat. Sci. 

 1878, p. 399. 



Several specimens. Tres Marias (I^os. 46581, 46582, IT. S. N. M.). 



CYPRJiA (LUPONIA) ALBUGINOSA, Mawe. 



Several examples. Tres Marias, Fisher (No. 46587, U. S. N. M.). La 

 Paz, Forrer. Fisher collected many fine living specimens at the former 

 place. 



CYPR.EA (LUPONIA) SOWERBYI, Kiener, 

 = C. zonata, Lamarck. 

 Several specimens. 



Port Escondido; Loreto; Los Animas Bay (No. 46593, U. S. N. M.). 

 Santa Margarita Island (beach), Albatross. 



Many fine exami^les were collected at the above places by Mr. 

 Fisher. Adults vary in size from long .91 to 1.81 inches. 



CYPR.EA (ARICIA) ARABICULA, Lamarck. 



A few living specimens. 



Port Escondido; and Maria Madre, Tres Marias. Extends south- 

 ward to Acajjulco, thence to Payta, South America. 



CYPR^A (TRIVIA) SANGUINEA, Gray. 



Not common, beach. Tres Marias (No. 46307, U. S. N. M.). 

 This species has a southerly range as far as Panama and the Gala- 

 pagos Islands. 



CYPR.EA (TRIVIA) SOLANDRI, Gray. 



A few examples. 



