1894. PROCEEDINGS OF THE NATIONAL MUSEUM. 191 



Pichilinqne Bay; also one fossil example, Santa Maig'arita Island, 

 Albatrofis. 



STROMBUS GRACILIOR. S <> w e r 1. y . 



Three beach shells. Pichilinqne Bay, Alfxttross. 



Family O K R i T H 1 1 D yK . 



CEKITHIUM MACULOSUM, Kiener. 



Common. 



Ties Marias (No. 322G5, U. S. N. M.) ; La Paz, Fisher, Forrer. Pichi- 

 linqne Bay, Ballenas Bay, and Santa Margarita Island, Albatross. Many 

 line examples with the scnlptnre prominent, and the knobs sharply 

 pointed. Has a wide geographical range, extending northerly on the 

 outer shore of the peninsula of Lower California, midway to the bound- 

 ary line of California; thence soutlierly to Ecuador and the Galapagos 

 Islands. Altata is another locality; (No. 32254, U. S. X. M.) 



CERITHIUM STERCIIS-MUSCARUM, Valenciennes. 



Abundant (No. 32276, U. S. N. M.). 



San Lucas Cove and Los Animas, Fisher; La Paz, Forrer. Pichi- 

 linqne Bay, Albatross. 



C'LAVA GEMMATUS, Hinds. 

 =^Verta(juH f/emmatiis, Hin'ds, ('ar]t('nter's chetk list, etc., and authors. 



Not infre<iuent. 



Tres Marias (No. 32294, IT. S. N. M.), Cape St. Lucas, and La. Paz. 

 Tliis form is quite common at Acai)ulco, where I obtained numerous 

 examples in 18(58. 



CLAVA (LIOCERITHIITM) INCISUM, Sowerby. 



Numerous specimens. 



La Paz; San Lucas Cove; Los Animas Bay ; Loreto; Angeles Island; 

 Mulege Bay ; San Francisquita Bay (No. 32291, U. S. N. M.) ; Boca de los 

 Piedras, and the Tres Marias; the latter locality somewhat doubtful. 



Fisher collected many line, large specimens of this. When full grown 

 it is a rather rare form. Immature examples are not uncommon in col- 

 lections, and do not exhibit the special character which indicates 

 Pyrazus. Fig. 1895 in Chenu's Manual, Vol. i, is a poor representa- 

 tion of this species. Individuals vary in measurement as follows: 

 Long., .94, lat., .25 inch, with 10 whorls; long., .69, lat., .26 inch, with 8 

 whorls; long., .50, hit., .20 inch, with 8 whorls. 



The short, stumpy fellows suggest another or different species. These 

 have been named G. curtum Sby., or G. euros Bayle. 



CBRJTHIDEA M\ZATLANICA, C a r p e n t e r 

 Common. 



