156 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
ella arcuated, obliquely truncated, with rudimentary plications; outer lip 
sharp. 
Type. Admete viridula Fabricius. 
Distribution. East and west coast of North America. (Tryon, 
Manual of Conchology .) 
Admete middendorffiana Dali, 1884 
Proceedings of the United States National Museum, 7:524; 24; PI. 38, fig. 6, 1902. 
This form is perfectly distinct from A . viridula, and may prove to be 
a Cancellaria. It is one of the characteristic forms of the Pacific Arctic 
and ranges north from Nunivak Island. The present specimen was ob¬ 
tained in 5 fathoms mud, in Norton Sound. (Dali.) 
Type in United States National Museum, No. 40961. Type locality, 
Nunivak Isand, Arctic. 
Range. Arctic coast of Alaska to Bristol Bay, Bering Sea. 
Admete regina Dali, 1911 
Nautilus, 25:16. 
Shell large, solid, white, with a coffee-colored periostracum and five 
or more whorls, the apex in every case being more or less eroded; spiral 
sculpture of fine, even-channeled grooves, with flattened or even slightly 
concave wider interspaces covering the whole shell except a space between 
the suture and the shoulder of the whorls; there are about two grooves 
and an interspace to a millimeter; axial sculpture of a few feeble, often 
more or less obsolete, irregular, low plications, not quite reaching the 
middle of the whorl; suture very deep but not channeled; whorls moder¬ 
ately rounded; base attenuated with a narrow, deep umbilical perforation; 
outer lip simple, hardly thickened, throat white, smooth, body with a 
smooth, white layer of callus; pillar concavely arcuate, with six or more 
feeble plaits, the anterior end of the pillar projecting over a deep notch. 
Height of shell, 36; of last whorl, 27; of aperture, 20; max. diam., 22 mm. 
(Dali.) 
Type in United States National Museum, No. 221473. Type locality, 
Plover Bay, Bering Sea, 25 fathoms. 
Range. Arctic Sea to Pribilof Islands. 
Admete rhyssa Dali, 1919 
Proceedings of the United States National Museian, 56:306. 
Shell small, white, with an olivaceous periostracum, a loosely coiled 
(decorticated) nucleus, and about four subsequent whorls separated by a 
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