PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 3177 
Scalaria Dalliana Verrill & Smith. 
Amer. Journ. Sci., xx, p. 395, Nov., 1880. 
Several specimens, living, from stations 869, 870, 871, and 874, in 65 
to 155 fathoms. 
-Acirsa gracilis Verrill, sp. nov. 
Shell white, with a long, slender, regularly tapered, rather acute 
spire and deeply impressed sutures. Whorls eight, evenly rounded, all 
except the last crossed by slightly raised but distinct rounded ribs, 
separated by wider interspaces; the ribs are most elevated just below 
the sutures and on the upper whorls. Lower whorls with numerous 
(eight or more) fine, slightly impressed spiral lines, producing narrow 
spiral cinguli, of which the lowest on the last whorl is strongest and bor- 
ders the base of the shell, which is convex and smooth. The spiral 
lines are absent near the sutures. Mouth reund-ovate, slightly effuse in 
front. Inner lip slightly reflected. No umbilicus. 
Stations 875 and 894, in 100 to 365 fathoms. 
This species is much more slender than Acirsa costulata Migh., sp., 1841 
(=A. borealis and A. Isehrichtii of authors), and its ribs are more reg- 
ular and distinct. A. prelonga Jeffreys has much finer sculpture. 
Aclis Walleri Jeffreys. 
G. O. Sars, Moll. Reg. Arct. Norv., p. 196, pl. 11, fig. 18. 
Three living specimens were taken at stations 892 and 894, in 487 and 
365 fathoms. 
Aclis striata Verrill, sp. nov. 
Shell small, white, somewhat lustrous, fragile, with moderately ele- 
vated spire; whorls six, well rounded, with deep sutures, the last one 
ventricose. Sculpture numerous fine, close, spiral grooves, covering the 
whole surface. Aperture simple, ovate. Outer lip thin, with a wide 
and rather deep sinus below the suture, but projecting strongly forward 
in the middle, where it is regularly rounded, then recedes somewhat 
anteriorly, joining the inner lip in an even curve. Inner lip discontinu- 
ous, slightly coneave and reflected in the umbilical region, where it joins 
the body-whorl. Umbilicus narrow, but deep. Nuclear whorl small, 
regular, smooth. Length, 4°"; breadth, 2". 
One specimen was dredged by me in the Bay of Fundy, near Hast- 
port, Me., in 1868; another was dredged in deep water off Newport, RB. 
I., this season, by the United States Fish Commission. 
This species is provisionally referred to Aclis because of its general 
resemblance to known species of that genus. Both my specimens were 
dead, and I have, therefore, no means of knowing the structure of the 
animal. Its regular apical whorl shows that it is not an Odostomia. 
Tie marked sinus of the outer lip and the distinct umbilicus are features 
not found in any other shell of our coast of similar size and appearance, 
Dead and broken specimens might be taken for bleached Cingula aculeus, 
