CLASS GASTROPODA 
261 
the last whorl ventricose, sculptured with numerous very unequal cords 
and threads, the larger cords widely spaced on the upper half, more 
numerous below. Over all there is a microscopic sculpture of distinct, 
fine and close, fold-like growth-striae, and very fine, subobsolete spiral 
striae. The suture is bordered with weak folds, sometimes stronger and 
tubercular. The aperture is half-round, glossy, dark chestnut-brown 
inside, the bevelled and slightly expanded lip cream-white. The basal 
notch is rather wide and not very deep. Length, 31; diameter, 20 mm. 
(Dali.) 
Type in Philadelphia Academy of Natural Sciences, No. 87757; also 
in Mr. Hirase’s Collection, No. 1597a. Type locality, Etoro, Chishima, 
Kuril Island, Japan. 
Range. Bering Island, Bering Sea; also Japan. 
Buccinum taphrium Dali, 1891 
Plate 25, fig. 6 
Proceedings of the United States National Museum, 14:186, 17:707; PI. 29, fig. 6. 
Small, thin, polished brown epidermis, with fine spiral striae and con¬ 
spicuous zigzag or spiral malleations; six-whorled, acute; suture deeply 
channeled; aperture white, with thick reflected lip and continuous thick 
callus on the concave pillar. Length of shell, 40; breadth, 18; length of 
aperture, 15 mm. (Dali.) 
In the absence of the operculum and soft parts this remarkable shell 
can be only provisionally classified. It appears buccinoid, but differs 
from all true Buccinum by its channeled suture and prominent body callus. 
It may prove to be a wholly distinct genus, but for the present it seems 
best to refer it to Buccinum as a subgenus. Only a single specimen 
is known. (Dali, 1894.) 
Type in United States National Museum, No. 122548. Type locality. 
Station 3330, in Bering Sea north of Unalaska, in 351 fathoms. 
Range. Known only from the type locality. 
Buccinum percrassum Dali, 1881 
Plate 5, fig. 4 
Proceedings of the United States National Museum, 9:216. Chonchylicn Cabinet, 
2d edition; PI. 91, fig. 5. 
Shell thick, like the Arctic form figured by Dr. Kobelt from photo¬ 
graphs of my type, but smaller and much darker in color. The operculum 
is disproportionately large for a Buccinum, nearly filling the aperture, 
and making a striking contrast with that of B. morchianum, which is 
always minute and much of the time absent entirely. (Dali.) 
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