118 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
change into a sharply marked edge (fig. 4) and a somewhat stronger spiral 
line. Size: axial length, 19; diameter, 10 mm. (Friele.) 
Type in Museum Christiania. Type locality, Magdalene Bay (Spitz- 
bergen=Svarlbard), 40-50 fathoms. 
Range. Plover Bay to Port Althorp, Alaska. 
Lora tenuilirata Dali, 1871 
American Journal of Conchology, 7:98. Proceedings of the United States National 
Museum, 56; Pi. 15, fig. 4. 
Shell pure white, with distinct revolving lines decussated by regular 
lines of growth. (Dali.) 
Type in United States National Museum. Type locality, Norton 
Sound, Alaska, at the Fort of St. Michael on the beach, dead, in very 
large numbers, and alive among stones at low water. 
Range. Point Barrow, Arctic Ocean, to Shumagin Islands, Alaska. 
Lora tenuilirata cymata Dali, 1919 
Proceedings of the United States National Museum, 56:42; PI. 16, fig. 4. 
Shell resembling typical tenuilirata, but with a higher and more acute 
spire, and with twenty or more narrow axial riblets on the last whorl, 
obsolete on the base, and a single spiral thread at the shoulder. Height 
23; of last whorl, 17; diameter, 10.5 mm. (Dali.) 
Type in United States National Museum, No. 226186. Type locality, 
Nunivak Island, Bering Sea. 
Range. Nunivak Island, Bering Sea, to Shumagins. 
Lora healyi Dali, 1919 
Proceedings of the United States National Museum, 56:42; PI. 16, fig. 8. 
Shell white, more or less discolored by ferruginous red (probably ad¬ 
ventitious) with five and a half rounded whorls, a subglobular smooth 
nucleus forming one and a half of these; spiral sculpture of (on the 
penultimate whorl 6 or 7, on the last whorl about 14) coarse rather irregu¬ 
lar cords with narrower channeled interspaces, the cords more or less 
nodulated by incremental lines and on the spire by obscure ribbing; suture 
distinct, aperture narrow, simple; pillar white, erased, canal short, straight. 
Height of shell, 15; of last whorl, 10; diameter, 7 mm. (Dali.) 
Type in United States National Museum, No. 223908. Type locality, 
Arctic Ocean north of Bering Sea. 
Range. Known only from type locality. 
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