1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 195 



Tres Marias (No. 32566, U. S. N. M.). Occurs also at the Galapagos 

 Islands aud on the coast of Ecuador. 



AM ALTHE A SERRATA, Carpenter. 



Four examples. Tres Marias (No. 32575, U. S. N. M.). 

 Ranges northerly along the coast of California proper, and southerly 

 to (?) Panama. 



Family NaticidvE. 



NATIC A CATENATA, P b i 1 i p p i . 

 Five specimens. Gulf of California (No. 46435, U. S. N. M.). 



NATICA CHEMNITZIl, Pfeiffor. 

 Eight specimens. Mazatlan, common in many places. 



NATICA EXC AVATA, C a r p e u t c r . 



One specimen, beach. Tres Marias (No. 4r)346, U. S. N.M,). This is 

 a decidedly rare species. 



NATICA ZONARIA, Recluz. 



Several examples living. Tres Marias (No. 46443, U. S. N. M.); Car- 

 men Island (No. 46441, U. S. N. M.). 



NATICA PRITCHARDI, Forbes. 



Numerous specimens. 



La Paz; San Lucas Cove; Los Animas; Angeles Island; Boca de los 

 Piedras; Tres Marias; Loreto, etc. A widely distributed form. Car- 

 penter has included under the name of " maroccana Chemnitz," the 

 above, as well as N. imifa.sciafa Lamarck and zonaria Eecluz. It is 

 probably true that these are all varieties of one and the same species, 

 but it is a matter of uncertainty as to which of these specific names 

 was first applied to West American shells. N. maroccana is credited 

 to the Galapagos Islands. 



P0LYNICE8 BIFASCIATA, Gray 



Numerous specimens. 



La Paz: San Lucas Cove, opposite Marcos Island (Nos. 46453, 46454, 

 U. S. N. M.); Pichilinque Bay, Albatross. 



Mr. Fisher reported the above as common at La Paz. A fine species, 

 not always hifasciate. Occasionally the space between the usual bands 

 on the latter part of the body whorl is filled in with white, thus uniting 

 and forming a single broad band. 



POLYNICES UBER, Valenciennes 



Common, living and on the beaches. 



Mulege Bay (No. 46436, U. S. N. M.); La Paz (No. 46461, U. S. N. M.); 



