Gould, A. A., 1853. Descriptions of shells from the Gulf of California and the Pacific coasts of Mexico and California. Boston Journal of Natural History, 6: 374       -408       .
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            New Species-Group Names:
            
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                    comptus Gould, 1853. p. 387. pl. xiv. f. 23. 
                
                 
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                    pusillus Gould, 1853. p. 388. pl. 14. f. 22.
                
 
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                    ravus Gould, 1853. p. 386. pl. 14. f. 21.