310 BULLETIN OF THE 



of the edentate rhachis, the tip of the largest tooth showing two deep notches, 

 separating two very sharp curved denticles from three much smaller denticles 

 below the lower notch. The foot is nearly five times as long as wide, grooved 

 below in its posterior half, bifid behind, double and nearly straight across the 

 front edge, which is a little wider than the sole behind it. The tentacles are 

 long and slender. The crop is armed on each side by a coriaceous plate, 

 opaque white inside, black outside, backed by a thin subovate horny plate, 

 having a minutely cellular or reticulated surface. 



Scala scipio n. s. 



Shell livid flesh-color, brilliantly polished, smooth, with nine to fifteen 

 whiter thin low varices, curved and appressed at the suture, where they are 

 slightly expanded; here and there one is of double size. The varices are often 

 but not always continuous; the whorls are rounded, ten or fifteen in number, 

 of which three, hardly distinguishable from the rest except 'by their paleness, 

 are nuclear ; mouth ovate, lip thin, narrow, reflected ; base rounded without a 

 disk or cordon ; suture distinct but partly filled by the expanded tips of the 

 appressed varices. Lon. 16.0, max. lat. 4.0 mm. 



A specimen of eleven whorls, without the nucleus and with the aperture 

 broken, was collected by Strebel at Vera Cruz, in 1866. A tip with the nucleus 

 from Station 2597, in fifteen fathoms, twenty miles S. W. by S. from Cape 

 Hatteras, N. C, was sent in by the U. S. Fish Commission, and one from 

 12 fms., near Frying Pan Shoals, by Dr. Rush,'U. S. N., both of which are in 

 the U. S. National Museum. This is the most slender recent species I have 

 seen, and is readily recognized by its livid pink color, glassy polish and thin 

 varices, compactly rolled spire, and absence of umbilicus, fasciole, or disk on 

 the base. It is nearest to S. aciculina Hinds, but still more slender and drawn 

 out. 



Scala apiculata n. s. 



Shell white, with three smooth nuclear whorls, then three whorls each with 

 15-20 close low even varices, then two whorls with about ten strong high 

 hardly reflected varices; interspaces on the early three whorls strongly, after- 

 ward less strongly spirally grooved, the interspaces on the last two whorls 

 quite smooth; shell imperforate, lip broad, not dentate behind, obsolete on the 

 body whorl, and produced and somewhat scooped out anteriorly, the inner 

 angle of this edge making a narrow fasciole around the axis. Lon. 5.0, lat. 

 2.5 mm. 



Habitat. Off the coast of North Carolina, Stations 2596 and 2616 of the 

 U. S. Fish Commission, in 17-50 fms., sand. 



This interesting little shell presents certain analogies with S. multistriata Say. 

 It is much smaller and more turbinate, the spiral sculpture and the numerous 

 varices exist on fewer whorls, the spiral sculpture fails entirely on the later 



