PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 377 



Scalai'ia Dalliana Verrill & Smitli. 



Amer. Jouru. Sci., xx, p. 395, Nov., 18S0. 



Several specimens, living, from stations 8G9, 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 round-ovate, slightly effuse in 

 front. Inner lip slightly reflected. j!^o umbilicus. 



Stations 873 and 891, in 100 to 305 fathoms. 



This species is much more slender than Acirsa costulata Migh., sp., 1841 

 {=A. borcalis and A. Uschrichtii of authors), and its ribs are more reg- 

 ular and distinct. A. pra'lonrja Jeffreys has much finer sculpture. 



Aclis "Walleri Jeffreys. 



G. O. Sars, Moll. Eeg. Ai'ct. Norv., p. 19G, pi. 11, fig. 18. 



Three living specimens were taken at stations 892 and 894, in 487 and 

 365 fathoms. 



Aclis striata Verrill, sp. iiov. 



Shell small, white, somewhat lustrous, fragile, with moderately ele- 

 vated spire ; Avhorls six, well rounded, with deep sutures, the last one 

 ventricose. Sculpture numerous fine, close, sj^iral grooves, covering the 

 whole surface. Aperture simple, ovate. Outer lij) thin, with a wide 

 and rather deep sinus below the suture, but i^rojectuig 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 concave 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 East- 

 port, Me., in 1808; another was dredged in deep water off Newport, E. 

 L, this season, by the United States Fish Commission. 



This species is i^rovisionally 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. 

 The 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 Gingula aculeus, 



