CLASS GASTROPODA 
121 
Range. Point Barrow, Arctic Ocean, to Pribilof Islands and the 
Okhotsk Sea. 
Lora laevigata Dali, 1871 
American Journal of Conchology, 7 :98; PI. 16, fig. 7. 
Shell short, stout, of four or five robust whorls, smooth, or with 
excessively fine revolving lines; spire short, usually one-third or less 
of the total length, but varying somewhat; suture distinct but not 
channeled, whorls not turreted, apex rather obtuse, nucleus minute, whit¬ 
ish, smooth of a whorl and a half; aperture about two-thirds as long as 
the shell, wide; outer lip effuse, sutural sinus more or less marked; canal 
short, straight, wide; exterior sometimes marked with rather rugged lines 
of growth, or quite smooth, but not polished; color livid purple, with a 
superficial wash of white, a solid white line below the suture, anterior 
extremity of the columella white, callus evident but not conspicuous. 
Long., 33; lat., 2 in. (Dali.) 
Type in United States National Museum. Type locality, Norton Sound, 
Alaska. 
Range. Kotzebue and Norton Sounds to Chirikoff Island, Alaska. 
Lora violacea Mighels and Adams, 1842 
Proceedings of the Boston Society of Natural History, 1:50. G. O. Sars, Mollusca 
regionis arcticae Norvegiae; PI. 17, figs. 2, 3. 
Testa atro-purpurea, longitudinaliter sub-plicata, transverse, striata; 
anfractibus sex, ultimo supra carinato, plicis in medio evanescentibus, 
alteris medio carinatis; spira acuta; apertura angustata; cauda brevi. 
Length, .3; breadth, .15 in. (Mighels and Adams.) 
Shell purplish-black, longitudinally sub-plicate, transversely striate; 
whorls six, the last carinated above and with evanescent median folds, 
the other whorls medially carinated; spire acute; aperture narrow; canal 
short. (Gould, Invertebrates of Massachusetts.) 
Type in Amherst College. Type locality, Casco Bay, Maine. 
Range. Sea Horse Islands, Arctic Ocean, to Bering Sea to Sitka, 
Alaska. Circumboreal. Fossil on Gravuna Island. 
Lora nodulosa Krause, 1886 
Plate 11, fig. 4 
Archiv fur Naturgeschichte, 51: 277; PI. 18, figs. 4, 12. 
Testa forma et colore “Belae violaceae ,, simillima, sed major et sculp- 
tura magis conspicus, praeterea carinis duabus nodulosis etiam in ultimo 
anfractu valde conspicuis diversa. Long, usque ad. 14.5 mm. (Krause.) 
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