SCALARIA. 313 



Found by Mr. C. F. Shiverick, at New Bedford and vicinity. 

 Buzzard's Bay, southwards (^Stunpson'). 



It dififcrs from S. Nov-Ariglke in its more robust and firm struc- 

 ture, its more numerous ribs, raised shoulder, and bands on the 

 lower whorl, its absence of uml)ilicus and revolving Unes, kc. It 

 belongs to the South, and is not uncommon there. Mr. Say speaks 

 of it as subject to considerable variety in the size of the ribs, the 

 breadth of the colored bands, &c. 



Scalaria multistriata. 



Shell white ; spire acute ; whorls eight ; ribs numerous, the spaces between 

 thera marked with fine revolving lines ; umbilicus none. 



Scalaria multistriata, Say, Amcr. Conch, pi. 27. — Sowerby, Thes. 108. -De Kay, N. 

 Y. Moll. 126. — Sti-MPSON, Check Lists, 5. 



Shell rather small, solid, white, acutely conic ; w^horls eight, very 

 convex, in firm contact, but well defined by the suture ; 



' _ ' _ •' Fig. 581. 



ribs numerous, varying in number from fourteen to 

 twenty, equidistant, and moderately elevated, simple, 

 erect, rounded at edges ; spaces between them marked 

 with numerous fine revolving lines. Aperture rounded- 

 ovate, more than one fourth the length of shell, mar- 

 gined by a rib ; pillar lip thick and rounded ; umbilical 

 opening none. Length, half an inch ; breadth, eight 

 twentieths of an inch ; divergence, thirty degrees. ^' "'"''"^'■"'"'• 



Two small specimens, which I think must be regarded as of this 

 species, were found by Mr. Shiverick, outside of Dartmouth Har- 

 bor. Buzzard's Bay. 



They vary in some respects from the description of Mr. Say. The 

 number of whorls is only seven, and of ribs thirteen. But ours are 

 small specimens, less than one fourth of an inch in length ; and Mr, 

 Say gives only sixteen ribs in his description, whereas an undoubted 

 specimen before me has as many as twenty. Tlie specific charac- 

 ter seems to consist in the revolving lines between the ribs, and the 

 destitution of an umbilicus. In this last respect it differs from S. 

 Nov-Anglice, while it corresponds with that shell in the first charac- 

 ter, and in its general outline. Other and probably larger speci- 

 mens will be found, and all doubts may thereby be removed. Should 

 it prove a distinct species. Professor Adams has proposed for it the 

 name of S. pulchella. 



