from the Gulf of California, etc. 401 
is broad, with its edge whitish; its basal termination is broadly 
rounded. 
The Pacific types are rarely more than one inch in length, elon- 
gated, more than half a cylinder; tubercles decidedly spinous ; 
aperture rather contracted, thinly coated with enamel within and 
destitute of the chestnut blotch; left lip comparatively narrow, its 
edge barely a little paler, its basal termination acute and curving 
quite abruptly towards the canal. 
These distinctions being constant, so far as I have seen speci- 
mens, would seem to be sufficient, together with their remote locali- 
ties, to authorize a separation under the above name. 
Among the rarer species contained in these California collections 
were Venus aurantiaca, Sowb., from Santa Barbara, supposed by 
Mr. Sowerby to belong to the PhilippineIslands; Venus gnidia, Ma- 
zatlan; Artemis gigantea, La Paz; Tellina regia, Mazatlan; 
Tellina Burneti, Brod. L. California ; Parapholas Californica, 
Conr. (P. Janellii, Desh.) S. Diego; Periploma planiuscula, Guay- 
mas; racia granulosa, La Paz; Anomia macrochisma, Mon- 
terey ; Trochus Norrisii, Santa Barbara; Oniscia tuberculosa, S. 
Juan; Cassis coarctata, S. Juan; Savidomus Nuttalli, Conr. (Ve- 
nerupis Petitii, Desh.) S. Diego; Cancellaria obesa, La Paz; Can- 
cellaria cassidiformis, La Paz; Cyrtulus distortus, Panama ; 
Ostrea Cumingiana, La Paz; Pectunculus giganteus, Guaymas ; 
Chiton Magdalenensis, Mazatlan ; Chiton muscosus, Gould (C. 
Collei, Reeve) Panama ; Chiton Stokesii, Brod. S. Francisco; Mar 
ginella imbricata, Hinds. Santa Barbara; Cerithum irroratum, 
Gould, Mazatlan; Sazicava Cordieri, Desh. Mazatlan; Tellina 
Bodegensis, San Francisco; Cardium elatum, Brod. San Diego ; 
Sanguinolaria decora, Hinds, San Diego. 
