166 Description of some 



the ribs already mentioned. Aperture ovate, elongate, extending 

 downwards into an open canal; the exterior rihs and folds plainly 

 visible within. When mature the right lip is slightly thickened in- 

 to a varix. The columella shows upon its upper part the trans- 

 verse ridges of the shell, the lower portion is smooth and some- 

 what twisted ; a slight umbilical trace is seen where the pillar lip 

 ia applied to the base of the shell : length, 4.25 inches, breadth, 2 

 inches. 



Habitat, Straits of St. Juan de Fuca, Oregon. 



Remarks. — I am indebted to the kindness of Dr. Budd, for the 

 opportunity of describing this curious shell. In form it resembles 

 the Fusus antiqnus (Lin.) Lam. It is very nearly allied to T. can- 

 cell at urn. Lam. and to T. scahrum, King, but it is readily distin- 

 guished from the firmer, by the absence of the elevated tooth or 

 ridge which is found upon the upper portion of the columella in 

 ihat Bpecies, while from the T. seabrUm it is distinguished by its 

 greater size, its elongation, the rounded character of its whorls, its 

 longer canal, and its more prominent cancellation. Its varices also, 

 though not very prominent, are more so than in cither of the species 

 just mentioned. 



Ranella Tiu-.rsites. Plate X. fig. 6, a.b. — My Cabinet — Cabi- 

 nets of Dr. fl Tr. Budd, ('. M. WheaOey and X. B. Wilbur. 



Tests' ovatl, gibbosd,, alhido-lutescente, tuberculatd. el transver- 

 sim sulcata ; tuberculis elevatis, acutis, compressis, interdum distor- 

 ts : raricibus transverse rugosi . ad suturas eanali instructis; aper- 

 turfl llaN.'i. wti.'i(juc extremitate canaliculate ; margine dentato, in- 

 crassato ; columella rugosi. 



Shell ovate, gibbous, composed of about seven whorls. The 

 ippi r whorls are angular at the middle and furnished al the angle 

 with a series of elevated, horizontally compressed, pointed tuber- 

 cles. These become quite large upon the last whorl and show an 

 inclination t<> distortion. The spire usually lias three of these tu- 

 ben le between each varix, bul <>n the back of the hut whorl, the 

 minil>er vaii.s from one i" i luce, one of the tubercles being some- 



