204 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Margarites rhodia Dali, 1920 
Plate 101, fig. 5 
Proceedings, Philadelphia Academy of Natural Sciences, 62. 
New name for Margarita inflata Carpenter, 1865. 
M. t. tumida, tenui, albida, narceo pallide aureo; anfr. vi. valde inflatis, 
suturis ad angulum fere rectum impressis; tota superficie tenuissime spira- 
liter lirulata; lirulis acutis, haud elevatis; in spira circ. viii., minoribus 
saepe intercalantibus; interstitiis a lineis incrementi extantibus creberrimis 
tenuissime decussatis; basi obtuse subangulata, striis creberrimis circ. xx. 
ornata; apertura subquadrata; columella arcuata; umbilico infundibulifori, 
laevi, angulato: operculo tenui, planato, suturis distinctis. Long., .44; long, 
spir., .22; lat., .45; div., 85°. (Carpenter's description of M. inflata.) 
Type in United States National Museum. Type locality, Puget Sound. 
Range. Port Althorp, Alaska, to San Diego, California. 
Margarites rudis Dali, 1919 
Proceedings of the United States National Museum, 56:364. Dali, Bulletin 112, 
United States National Museum; PI. 18, figs. 13, 14. 
Shell of moderate size, white, with a pale olivaceous periostracum, a 
smooth nucleus of about one whorl and five subsequent whorls; spiral 
sculpture of two strong cords with wider interspaces and a third on which 
the suture is laid and which forms the margin of the base; there is also a 
small thread between the suture and the posterior cord and on the last 
whorl a similar thread in the interspaces; on the base there are six or seven 
smaller closer cords separated by obscurely channeled interspaces between 
the verge of a narrow umbilicus and the basal margin; axial sculpture of 
(on the penultimate whorl about 20) retractive riblets extending from 
suture to periphery, with wider interspaces, slightly nodulous at the inter¬ 
sections with the spiral cords; there are also close, obvious, incremental, 
regular lines over the whole surface; aperture rounded quadrate, simple, 
a glaze on the body, the pillar lip slightly thickened; operculum multispiral. 
Height, 12; diameter, 12.5 mm. (Dali.) 
Type in United States National Museum, No. 213951. Type locality, 
Coal Harbor, Shumagins, Alaska, in 8 fathoms. 
Range. Bering Sea to Cook's Inlet, Alaska; also Kamchatka. 
Margarites healyi Dali, 1919 
Proceedings of the United States National Museum, 56:363. 
Shell large, livid yellowish white, with a thin very pale periostracum 
and about six whorls including a smooth white turbinate nucleus of two 
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