SCALARIANA. MOLLUSCA. SCALARIA. 249 



It very much resembles S. multistriitta, 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. mucrontita, Risso, it is also closely 

 allied. 



SCALA'RIA GR(ENLA'NDICA. 



Shell 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 clathruB Grcenlandicus, CHEMN. ; ConcA., si. t. 1878, 1879. 



Scalaria planicosta, KIENER; Iconog., (Scalaria,) pi. vii. f. 21. 



Scalaria subulata, COUTHOUY ; Bost. Journ. Nat. 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 ^ 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 



