SCALARIANA. MOLLUSCA. SCALARIA. 249 



It very much resembles S. muUistridta, 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 ci'owned 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. mucronata^ Risso, it is also closely 

 allied. 



Scala'ria Grgenla'ndica. 



&hell elongated^ regularly tapering to a point, of a livid color ; 

 whorls ten, in close contact, moderately convex, and traversed by 

 flattened, white ribs, the intervening spaces with distant, coarse, 

 revolving lines ; no umbilicus. 



Figure 160. "/^.^^ 

 State Coll., No. 49. Soc. Cab., No. 1634. 



Turbo clathrus Groenlandicus, Chemn. ; Conch., xi. t. 1878, 1879. 



Scalaria planicosta, Kiener j Iconog., (Scalaria,) pi. vii. f. 21. 



Scalaria subulata, Couthouy ; Bost. Joiirn. jVat. Hist., ii. 93, pi. 3, f. 4. 



Shell turreted, long, and regularly tapering to a fine point, of 

 a dead bluish-white or livid-brown color ; whorls ten, rather 

 flattened, barred with eight to fifteen stout, flattened, oblique, 

 white ribs, some of which are apparently double ; ribs not termi- 

 nating abruptly, but bending, and flowing along the sutural space to 

 the preceding ones ; the intervening space is marked by six or 

 eight coarse, rounded, equidistant ridges and revolving lines ; a 

 single one, nearly as elevated as the ribs, revolves from the upper 

 angle of the aperture ; aperture nearly round, bordered by a rib ; 

 left lip a little expanded, and projecting into a perceptible angle in 

 front. Length 1 inch, greatest breadth tjV inch, divergence 34°. 

 Found thrown upon Nahant Beach, and taken from fishes 

 caught in Massachusetts Bay, and at the Grand Banks, abundant- 

 ly. Mr. Couthouy found one alive at Phillips's Beach, the animal 

 of which he describes nearly as follows : 



Animal yellowish-gray, thickly and irregularly marked with 

 dull-whitish spots, most conspicuous on the sides of the neck ; 

 foot short, thick, and nearly quadrangular ; head elongated, round- 

 ed superiorly, not separated from the neck by any distinct line ; 

 tentacula two, about an eighth of an inch long ; eyes small, black 



32 



