CLASS GASTROPODA 
63 
Cryptoconus carpenterianus Gabb, 1865 
Proceedings of the California Academy of Sciences, 3:183. Paleontology of San Pedro, 
California, 2: PI. 1, fig. 8. 
P. t. fusiformis; anfractibus viii, prope suturam concavis; tota super- 
ficie confertim et spiralitur costulata; colore aurantiaco, lineis rufo-brun- 
neis interruptis induta; apertura angusta; sinu posticolato; haud profundo. 
Long., 2; lat., 7; long, aper., 1.1 in. (Gabb.) 
Fusiform, spire high, acute, whorls eight, slightly concave near the 
suture, convex below. Surface marked by numerous rounded revolving 
ribs, sometimes alternating in size, especially on the lower part of the 
body whorl. Color orange with broken revolving bands of a bright reddish- 
brown ; these lines or bands usually occupy the larger ribs, and are more 
distant on the middle of the whorl and more closely placed above and 
below; they average about a tenth of an inch apart. Aperture narrow, 
growing proportionally broader in older shells; canal moderate, slightly 
twisted, inner lip lightly incrusted; outer lip acute, sinus broad and 
shallow. (Gabb.) 
Type in California Geological Survey, Nos. 819 and 1021. Type 
locality, Post-Pliocene—Santa Barbara, California. 
Range. Bodega Bay to San Pedro, California. Fossil: Pleistocene— 
Santa Barbara, San Pedro, San Diego, and Ventura, California; Pliocene— 
Santa Rosa, San Fernando, San Diego (well), California. 
Genus AFORIA Dali, 1889 (Pleurotoma) 
This group has the shell of a typical Pleurotoma , but has no operculum; 
the typical species reaches three or four inches in length, is strongly 
carinated above the periphery, and the wide rather deep anal sulcus is 
nearer to the carina than to the suture. (Dali.) 
Type. Pleurotoma circinata Dali. 
Aforia circinata Dali, 1873 
Plate 4, fig. 1 
Proceedings of the California Academy of Sciences, 5:61; PI. 2, fig. 5. 
Shell slender, elongate, covered with a brownish epidermis; whorls 
six, with a single, sharp, narrow carina, about the middle of the whorl, 
in the upper whorls; this carina does not interrupt the even rotundity of 
the whorls so as to produce any flattening of the latter, but appears as if 
it had been placed upon the equator of the whorl, after the latter had been 
completed. The posterior surface of the carina and that part of the 
whorls behind it, are destitute of any but the most microscopic revolving 
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