CLASS GASTROPODA 
115 
menti interdum conspicuis; lamina interna. Long., 0.26; lat., 0.24; alt., 
0.15; div., 80°. (Carpenter.) 
Shell small, thin, whitish, with nuclear vertex planate, standing out, 
very small; with one whorl, and in the middle flattened-vermiculate, with 
conspicuous apex; then conoidal, elevated, with corroded spire, with im¬ 
pressed sutures; surface rough, with laminae of growth sometimes con¬ 
spicuous; with internal lamina. (Translation.) 
Type in State Collection, No. 369. Type locality, Monterey, California. 
Range. Monterey, California, to the Gulf of California. Described as 
Golems contortus Carpenter. 
Calyptraea fastigiata Gould, 1846 
Plate 93, fig. 5 
Proceedings of the Boston Society of Natural History, 2:161. Mollusca and Shells of 
the United States Exploring Expedition, 379; figs. 484, a, b. 
Testa parva, tenuis, laevis, rotundata, elevato-conica, concentrice et 
tenuissime striata, epidermide fuscente induta; spira anfractibus tribus 
planulatis, apice sub-mediano, acuto; lamella interna spiralis, striata; mar- 
gine soluto, ad centrum duplicato, haud appresso, umbilicum parvum 
efformante. 
Shell small, thin, smooth, rounded at base, elevated-conical; the apex 
central, acute; the spire composed of three flattened whorls. Surface 
faintly marked by very delicate lines of growth, and covered by a thin, 
pale-yellow epidermis. Interior white, with a spiral lamella (septum) com¬ 
mencing at the vertex, and making half a revolution, terminating at the 
margin; its free edge folded. Diameter half an inch; altitude five-eights 
of an inch. (Gould.) 
Type in United States National Museum. Type locality, Puget Sound. 
Range. Port Etches, Alaska, to Puget Sound. 
Genus CRUCIBULUM Schumacher, 1817 
Differs from Calyptraea in the internal cup-shaped lamina, which is 
entire and attached along a line on one side to the inner wall of the shell. 
(Tryon, Structural and Systematic Conchology.) 
Type. C. rudis Brod. 
Distribution. Temperate and tropical; world-wide. 
Crucibulum spinosum Sowerby, 1824 
Genera of Shells, “Calyptraea,” figs. 4, 7. Conchologia Iconica, 11; PI. 4, fig. 10. 
Cruc. testa orbiculari, interdum subquadrato-ovata, nunc solidiuscula, 
convexa, nunc depressa, tenuicula, radiatim lirata et irregulariter corru- 
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