CLASS GASTROPODA 
259 
Buccinum tenebrosum Hancock, 1846 
Annals and Magazine of Natural History, 18:327. 
Shell ovate, ventricose, very thin, glossy, of a dark obscure violet, 
clouded and spotted with grayish white and tawny, particularly at the 
sutures, where the spots are usually well-defined; whorls six or seven, 
much rounded, and covered with fine waved lines of growth, and a few 
minute, depressed spiral lines obsolete on the body-whorl; body-whorl 
one-third longer than the spire, with eight or nine strong, distant spiral 
ridges or keels, three or four of which are continued on to the third whorl; 
mouth as long as the spire, broadish oval, with the interior of a dark 
chocolate-brown extending over the columella; outer lip thin, entire; 
columella very dark, glossy, rather straight, with an obsolete plait or fold, 
which gives to it the appearance of being twice bent; the inner margin f 
is well-raised and considerably reflected; the canal short and rather wide; 
epidermis very strong, of a greenish horn-color, glossy, with fine distant 
longitudinal laminae, bearing minute widely separated cilia. Length, 1*4; 
breadth, nearly 1 in. (Hancock.) 
Type in? Type locality, west coast of Davis's Strait. 
Range. Bering Strait; circumboreal. 
Buccinum ciliatum Fabricius, 1780 
Fauna Gronlatidica, 401. Conchylien Cabinet, 2d edition; PI. 78, figs. 5, 6, 1883. 
Testa turrita, patilo-subcaudata, striata, angulata, longitudinaliter 
ciliata, columella subplicata. Long., 5 y A ; lat., 3.1 in. (Fabricius.) 
Test turreted, flatly subcaudate, striate, angulata, longitudinally ciliate, 
columella subplicate. (Translation.) 
Shell similar to B. undatum, but thin, paper-like, and destitute of 
folds, except short ones near the suture, so as to give that part a crenated 
appearance. The whorls are more concavely rounded, so as to be nearly 
cylindrical; surface with minute and close revolving lines, color yellowish 
or livid, most specimens with blotches, or dashes of brown; epidermis 
fawn-colored and hispid, with short hairs, arranged for the most part 
along the lines of increase. Aperture short, rounded, lip very thin; throat 
pure white, or yellowish. The pillar has a very oblique, obscure fold. 
(Gould: Report on the Invertebrates of Massachusetts.) 
Type in Copenhagen Zoological Museum. Type locality, Arctic. 
Range. Point Barrow, Arctic Ocean, to Aleutian and Shumagins; 
and on the Atlantic from Greenland to the Newfoundland Banks. Fossil: 
Montreal. 
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