CLASS GASTROPODA 
205 
moderately rounded whorls; suture distinct, not appressed, the whorls 
between not inflated; axial sculpture of oblique quite incremental lines, 
occasionally developed into minute wrinkles; spiral sculpture of rather 
irregularly spaced low threads, about a dozen on the penultimate whorl, 
with wider interspaces; especially near the periphery on the spire; on the 
last whorl, including the base, they are more numerous and closer; base 
slightly flattened with a narrow, perforate unbilicus; aperture oblique; 
simple, nacreous; body with a coat of enamel; pillar straight, slightly cal¬ 
lous, with no projection at the base; height of shell, 20.5 ; of last whorl, 15 ; 
maximum diameter, 20 mm. (Dali.) 
Type in United States National Museum, No. 223801. Type locality, 
Arctic Ocean, north of Bering Strait, Station 10 of U.S.S. “Corwin.” 
Range. Arctic Ocean north of Bering Strait. 
Margarites simbla Dali, 1913 
Proceedings of the United States National Museum, 45:592. Dali, Bulletin 112, 
United States National Museum; PI. 18, fig. 3. 
Shell pale gray, beehive-shaped, with a blunt apex and five and a half 
rapidly enlarging convex whorls; nucleus minute; subsequent whorls pol¬ 
ished, finely spirally striate, crossed by very fine flexuous striae corre¬ 
sponding to the lines of growth, which more or less microscopically crenu- 
late the interspaces between the spirals; suture not impressed; base with 
an obscure angulation peripherally, the sculpture similar to the rest of the 
shell but more pronounced; umbilicus narrow, deep; aperture subquad¬ 
rate, oblique; the pillar thin, white; the throat pearly. Height of shell, 
13; of last whorl, 10; maximum diameter of base, 14 mm. (Dali.) 
Type in United States National Museum, No. 267172. Type locality, 
deep water off Santa Barbara Channel, California. 
Range. Off Santa Barbara Islands, California. 
Subgenus Lirularia Dali, 1909 
Margarites succincta Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 653. 
Annals and Magazine of Natural History, ser. 3, 14:424. Dali, Bulletin 112, 
United States National Museum; PI. 17, fig. 9. 
Small, scarcely sculptured, with spiral brown pencillings. (Carpenter.) 
G. testa parva, subelevata, solidiore; livida, testa jun. strigis angustis, 
creberrimis, fusco-purpureis penicillata, testa adulta maculis quoque mag- 
nis nebulosa; anfr. v., subquadratis; liris obtusis medianis et striis sub- 
obsoletis cincta, suturis valde impressis; basi rotundata, obtuse angulata, 
striis saepe evanidis spiralibus ornata, testa adulta circa umbilicum mag- 
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