CLASS GASTROPODA 
61 
Type. Conus marmoreus Linnaeus. 
Distribution. All tropical seas, one species on the California coast. 
Fossil: Chalk to Pleistocene—Britain, France, India, Java, Pacific. 
Conus californicus Blinds, 1844 
Zoology of the Voyage of H. M. S. Sulphur, Mollusca, 6; PI. 1, figs. 3-6. 
Testa encoronata, subfusiformi, involute, laevi, pallida vel ferruginea, 
lineisrufa regulariter induta, maculis parvis lacteis conspersa; spira conica, 
elata; labio subarcuato, acuta; epidermide castanea velutina. (Hinds.) 
A somewhat small species, when clothed in its velvety epidermis 
reminding one strongly of a large filbert, and when this is removed dis¬ 
playing a pale iron-rust colored surface, traversed at equal distances by 
numerous reddish lines and with small milk-white spots occasionally 
scattered about in irregular clusters. (Hinds.) 
Type locality, Magdalena Bay, Lower California. 
Range. Farallon Islands, California, to Magdalena Bay, Lower Cali¬ 
fornia. 
Family TURRITIDAE (Pleurotomidae) 
Genus CRYPTOCONUS von Koenen, 1867 (Surcula) 
Shell biconical; spire elevated; aperture narrow, with borders sub¬ 
parallel ; the columella border furnished on the posterior part with one or 
two foldlike ridges. Lip arcuate; labial sinus wide and deep. (Translation.) 
Type. Pleurotoma filosa Lamarck. 
Cryptoconus tryonianus Gabb, 1866 
Paleontology of San Pedro, California, 2:6; PI. 1, fig. 9. 
Shell large, fusiform; spire about as long as the mouth; whorls about 
seven or eight, angulated in the middle, sloping concavely above, and very 
slightly convex below. Surface ornamented by a row of nodes on the 
angle of the whorl, and by numerous fine revolving ribs. Aperture 
narrow; inner lip slightly sinuous and incrusted; posterior sinus of outer 
lip broad and shallow; canal moderate, nearly straight. Length, 95; 
height, 35 mm. 
Type in University of California. Type locality, Post-Pliocene of 
San Pedro, California. 
Range. San Pedro, California, to Todos Santos Bay, Lower Cali¬ 
fornia. Fossil: Pleistocene—Santa Barbara, San Pedro. 
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