CLASS GASTROPODA 
119 
Lora murdochiana Dali, 1919 
Proceedings of the United States National Museum, 7 :524; PI. 2, fig. 8. 
Shell whitish, short, stout, with rather coarse sculpture and very short 
spire, whorls about five, the last much the largest; whorls inflated, suture 
deep, almost channeled, sculpture of numerous (on the last whorl about 
two to the millimeter) narrow, backwardly convex, flexuous riblets with 
about equal interspaces, strongest near the suture, not crossing the fas- 
ciole and obsolete near the periphery; lines of growth distinct, crossed 
by numerous (about six to the millimeter) rather coarse threads, of which 
each alternate one tends to be smaller, separated by narrow grooves and 
about uniformly distributed over the surface, with a tendency to a faint 
carina in front of the indistinct fasciole; outer lip sharp, columella simple, 
white; aperture pinkish, canal short, wide; nuclear whorls eroded in the 
specimens; operculum light horn color, rather broad and short. Long, of 
shell, 11.5; of last whorl, 10; max. lat. of shell, 8.5 mm. (Dali.) 
Type in United States National Museum, No. 40960. Type locality, 
Cape Smythe, Arctic. 
Range. Point Barrow, Arctic Ocean, to Pribilof Islands, Bering Sea. 
Lora chiachiana Dali, 1919 
Proceedings of the United States National Museum, 56:43; Pi. 14, fig. 7. 
Shell olive brown, with five whorls, the nucleus eroded, suture dis¬ 
tinct; upper whorls with about 16 axial, rather rude, roughly sigmoid 
riblets crossing the whorls, obsolete on the latter half of the shell, the 
incremental lines irregular; spiral sculpture of almost obsolete fine spiral 
striae most evident on the last whorl, the interspaces flattish, wider, sub¬ 
equal; aperture brownish, simple, pillar white, canal slightly recurved. 
Height of small, 20; of last whorl, 14; diameter, 9 mm. (Dali.) 
Type in United States National Museum, No. 206207. Type locality, 
Chiachi Islands, Aleutian. 
Range. Arctic Ocean to Chiachi Islands and Port Althorp, Alaska. 
Lora mitrata Dali, 1919 
Proceedings of the United States National Museum, 56:43; PI. 16, fig. 1. 
Shell resembling tenuilirata cymata, but with sharper sculpture, higher 
spire, shorter aperture, more gyrate pillar, and darker color, especially on 
the keel at the shoulder. Height of shell, 24; of last whorl, 16; diameter, 
11 mm. (Dali.) 
Type in United States National Museum, No. 87857. Type locality, 
Port Clarence, Bering Strait. 
Range. Bering Strait to Shumagin Islands, Alaska. 
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