312 SCALARIID^. 



Shell tiirreted, elongated, thin, of a glossy white color, with here 

 and there an irregular rusty blotch ; whorls ten, cylindrical, barely 

 touching each other, crossed by eleven somewhat oblique, delicate 

 bars, of a pure white color, three or four of which, on the lower 

 whorls, are more robust than the rest ; the bars do not cross the 

 sutures, and each has a little spine at its posterior termination. 

 The space between the ribs is thickly marked with very fine revolv- 

 ing lines, which are also crossed by still finer ones ; aperture nearly 

 circular, bordered by a robust rib, with a spine like the others, flat- 

 tened so as to form a blunt angle at its anterior portion, and par- 

 tially concealing a small umbilicus. Length, seven tenths of an 

 inch ; greatest breadth, one fourth of an inch. 



Only one specimen has as yet been found, and this was taken 

 from the stomach of a fish caught off Cape Ann, by Mr. Couthouy. 



It very much resembles S. muUislriata, Say, but that shell is de- 

 scribed as imperforate, whereas this has a small umbilical opening ; 

 and no mention is made of the ribs being crowned by a spine. In 

 general form it is also like S. clathrus, but that is imperforate, and 

 is smooth between the ribs. To the S. mucronaf.a, Risso, it is also 

 closely allied. 



Scalaria lineata. 



Shell conical, white, with eight whorls, traversed by sixteen to eighteen deli- 

 cate ribs, and the lower one by a revolving, raised line and one or more brown- 

 ish bands; aperture oval ; lip strong ; umbilicus none. 



Scnlarin lineata, Say, Journ. Acad. Nat. Sc. ii. 242; Amer. Conch, pi. 27; ed. Binnet, 

 83, 180. - Gould, Inv. 1st cd. 2.50. — De Kay, N. Y. Moll. 126, pi. 6, fig. 125.— 

 SoWERBY, Thes. Conch. 101, pi. 23, figs. 19-21. — Stimpson, Check Lists, 5. 



Shell elongated-conical, pointed, white or tinged with brownish ; 

 whorls eight, rounded, not disjoined, but defined by a well- 

 impressed suture ; about sixteen to eighteen very delicate 

 and slightly raised longitudinal ribs, not crossing the sut- 

 ure, traverse each one ; intervening spaces smooth ; a 

 raised line or rather step, originating from the junction 

 of the lips, revolves on the lower whorl, and defines the 

 upper edge of a reddish-brown revolving band ; another 

 fainter band is usually seen just below the suture. Aper- 

 ture sub-oval, bordered by a strong, rounded lip, which is 

 a little expanded at the anterior angle. Lmbilicus none. 

 Length, about half an inch ; breadth, one fifth of an inch ; diver- 

 gence, thirty-six degrees. 



