192 SHELLS OF LOWER CALIFORNIA— STEABNS. vol.xvii. 



La Paz and elsewhere in the Gulf rejn^ioii. Ballenas Bay, abundant, 



Albatross. 



CERITHIDEA ALBONODOSA, Carpenter. 



Several examples. 



San Juanico, and other points on the outer coast of Lower California. 

 Both this and mazatlanica may be varieties of the more northern form 

 sacrata Gould. 



Family Modulid^. 

 MODULUS CERODE8, A. Ada-ras. 



Ifumerous examples. Tres Marias (No. 46953, U. S. N. M.). 



This pretty and not very common form is apparently rather numer- 

 ous at these islands, and at a few other points on the shores of the 

 Gulf; obtained at Pichilinque Bay by the Albatross collectors. It 

 occurs at the Galapagos Islands. 



MODULUS DISCULUS, Pliilippi. 



A few si^eciraens. 



Tres Marias (Ko. 46957, U. S. N. M.), not nnmerons; the foregoing 

 species appear to be distinct, without connecting varieties. M. disculus 

 is by far the more restricted in distribution. It is found also at 

 Mazatlan, Acapulco, and Panama. 



MODULUS CATEIS'ULATUS, P h i 1 i p p i . 



A few examples. Tres Marias. Less common than the others. 

 Occurs at Mazatlan, (ruaymas, etc. 



Family Vermetid^s. 



VERMETUS (PETALOCONCHUS) MACROPHRAGMA, Carpenter. 

 Two specimens. Tres Marias; Los Animas (No. 9502, U. S. N. M.). 



VERMETUS (SERPULORBIS) SQUAMIGERUS, Carpenter. 



Two specimens. 



Sta. Margarita Island (No. 192398, U. S. N. M.), and at Pichilinque 

 Island (No. 117971, U. S. N. M.), Albatross. 



VERMETUS (SERPULORBIS) PELLUCIDUS, Broderip and Sowerby. 



One example. Pichilinque Bay, Albatross, on Pecten subnodosus. 



VERMETUS (SERPULORBIS) PELLUCIDUS, Broderip and Sowerby, 

 Var. ^= ehurneus, Rekve. 



