CLASS GASTROPODA 
59 
Turritellopsis acicula stimpsoni Dali, 1919 
Proceedings of the United States National Museum, 56:345. Sars, Mollusca regionis 
arcticae No-rvegiae, PI. 10, fig. 14. 
A comparison of the figures of Stimpson and Sars, both elegant and 
accurate draftsmen, shows at once that there is a wide difference between 
them. T. acicula is more slender, with a looser coil and a much more 
constricted suture. It has three strong spiral cords, while T. stimpsoni 
has five to seven. The West Coast specimens so far obtained are of the 
stimpsoni type, which is represented in the Jeffreys collection from Lofo¬ 
ten, Spitzbergen, and Maine. The original acicula type came from Grand 
Manan; Portland, Maine; and Newfoundland. On the Pacific side we 
have the stimpsoni from Nunivak Island, Fort Etches; Shoal Bay, British 
Columbia; and San Diego, California. (Dali.) 
Type in United States National Museum. Type locality ? 
Range. Nunivak Island, Alaska, to San Diego, California. Circum- 
boreal. 
Family LITTORINIDAE 
Genus LITTORINA Ferussac, 1822 
Shell turbinated, thick, pointed, few-whorled; aperture rounded, outer 
lip acute, columella rather flattened, imperforate. Operculum paucispiral. 
(Tryon, Manual of Conchology .) 
Type. Littorina littorca Linnaeus. 
Distribution. World-wide. Fossil, Norwich Crag, England, Mio¬ 
cene .... 
SECTION ALGARODA Dali, 1918 
Littorina squalida Broderip and Sowerby, 1829 
Zoological Journal, 4:370. Zoology of Bcechey’s Voyage, 139: PI. 34, fig. 12. 
L. testa obovali, apice acuminate; anfractibus superne depressiusculis; 
apertura rotunda, labio superne coarctato. 
Shell very much like the common Periwinkle, but not so thick and 
heavy; it is further distinguished by the contraction of the upper part of 
the lip. Long. 1; lat. 8/10 poll. (Broaderip and Sowerby.) 
Type in British Museum. Type locality, Oceano Boreali. 
Range. Cape York, Arctic Ocean, to Pribilof Islands and the Okhotsk 
Sea. 
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