528 A, E, Verrill— Catalogue of Marine Mollusca. 
Scalaria angulata (Say). 
Scalaria clathrus, var. angulata Say, Amer. Conch., iii, pl. 27, upper figures, 1831. 
Scalaria Humphreysii Kiener, Icon. Coq. Viv., p. 15, pl. 5, fig. 16, 1838-1839. 
Scalaria angulata Verrill, Rep. Invert. Anim. Vineyard Sd., in Rep. U.S. Fish Com., 
i, p. 660 (auth. cop., p. 366), 1874. 
Scala (Clathrus) angulata H. and A. Adams, Genera, i, p. 222, 1858. 
Stonington, Connecticut, to Florida. Not often found north of 
Chesapeake Bay. Great Egg Harbor, N. J.! Stonington.—Linsley. 
Greenport, Long I.,—S. Smith. Common at Beaufort, N. C.! 
Acirsa gracilis Verrill. 
Acirsa gracilis Verrill, Proc. U.S. Nat. Mus., iii, p. 377, 1880. 
PLATE LVII, FIGURE 31. 
Stations 873 and 894, in 100 to 365 fathoms, off Martha’s Vineyard, 
U. S. Fish Com. 
Aclis striata Verrill. 
Aclis striata Verrill, Proc. U.S. Nat. Mus., ili, 377, 1880. 
Puate LVIII, Fiecure 13. 
One specimen was dredged by me in the Bay of Fundy, near East- 
port, Me., in 1868; another was dredged at station 873, in 100 fath- 
oms, off Newport, R. [., in 1880, by the U. 8. Fish Commission. 
Aclis Walleri Jeffreys. 
G. 0. Sars, Moll. Reg. Arct. Norv., p. 196. pl. 11, fig. 18. 
Aclis Wallert Verrill, Amer. Journ. Sci., xx, p. 391, Nov., 1880; Verrill, Proc. U. 8. 
Nat. Mus., iii, p. 377, 1880. 
PLATE LVII, FIGURE 36. 
Three living specimens were taken at stations 892 and 894, in 487 
and 365 fathoms, off Martha’s Vineyard, 1880. 
Aclis tenuis Verrill, sp. nov. 
Eulimelia ventricosa (pars) Verrill, Proc. Nat. Mus., iii, p. 380, 1880 (non Forbes, sp.) 
Puate LVIII, Figure 19. 
Shell white, glossy, very slender, with a regularly tapered, acute 
spire. Whorls nine, evenly rounded, nearly smooth, but under the 
microscope showing slightly raised spiral lines, or obscure angles, on 
the lower whorls. Suture well-impressed. Aperture ovate-elliptical ; 
outer lip well rounded, a little prolonged, or effuse, at the anterior 
