Shell reddish brown, turrited, scalar, with 8-9 corded varices; the interior of the aperture darker and redder, the outer lip arched, sharply internally lirate; pillar lip with a moderate callus and about the middle two strong plications; anterior notch shallow; umbilicus none in young shells, and very small in adult specimens. This shell has a depressed polished brown nucleus of about two and a half whorls, and our largest specimen has four sculptured whorls with about (on the last whorl) nine rounded strong varices crossing the whorl. At the beginning of the last whorl there are about eight spiral strong threads between the sutures, equally strong on and between the varices; there is also a single fine thread between each two coarse ones. The epidermis is coarse, fibrous, and dehiscent. The sutures are very deep, the mouth ovate trigonal, with about eight strong lirae within the outer lip and two well-marked plaits on the inner lip; the margin of the aperture is continuous; there is a very small umbilical chink in the adult, but none in the young. The throat is of a ruddy brown. The largest specimen measures 10.5 mm by less than 6.0 mm., and the aperture less than 5.0 mm. in length.
DESCRIBED BY DALL as Trigonostoma smithii

This interesting species is named in honor of Mr. Sanderson Smith of the XT. S. Fish Commission. It is related to the Miocene Cancellaria scalatella Guppy, from which it is distinguished by its more attenuated form, fewer varices, and smaller aperture. It differs from C. funiculata Hinds, by the continuous spiral strias between the varices, greater attenuation, and its chestnut (fading to a lighter) brown color. C. minima Reeve is very like it, but wants the very deep sutures, is smaller, and has a larger number of varices.

Type Location: Northwest Atlantic: off Cape Lookout. Also North Carolina and Florida.