84 AMERICAN MARINE CONCHOLOGY. 



The animal is white, with moderately produced head and foot 

 slightly dilated at the anterior angles ; eyes black. 



New England. (Europe.) 



According to Mr. Gwyn Jeffreys, this species = striata, J. 

 Adams, 1795. 



7. R. MULTILINEATA, Stimpson. Fig. 159. 



Proc. Bost. Soc. Nat. Hist. iv. 14. 1851. 



Shell minute, oblong-ovate, blunt, white; whorls five, convex, 

 marked with about twenty minute, transverse stride ; aperture or- 

 bicularly ovate, peristome not thickened, effuse. 



Shorter than aculeus, with the whorls more compactly coiled 

 and stronger striae. The latter are more numerous than in the 

 following species. 



Length 2.5, diam. 1 mill. 



New England. 



8. R. MIGHELST, Stimpson. Fig. 160. 



Proc. Bost. Soc. Nat. Hist. iv. 15. 1851. 



Cingula arenaria, Mighels and Adams (not Montagu). Bost. Journ. iv. 

 49, t. 4, f. 24. 1842. 



Shell minute, white, subcylindrical, subplicate longitudinally 

 and minutely striate trans versely ; spire elongated, conical; whorls 

 six, convex ; suture impressed ; aperture moderate, suborbicular. 



Length 2.5, diam. 1.2 mill. 



Maine. 



9. R. EXAEATA, Stimpson. Fig. 161. 



Proc. Bost. Soc. Nat. Hist. iv. 15. 1851. 



Shell small, ovate, fuscous, rather solid, imperforate; whorls 

 five, rather convex, subplicate posteriorly, and with inequidistant, 

 elevated, transverse ribs, three on the upper whorls. Aperture 

 small, ovate, peristome thickened. 



Length 2.6, diam. 1.2 mill. 



Massachusetts. 



10. R. CARINATA, Mighels and Adams. Fig. 162. 



(Cingula.) Bost. Journ. Nat. Hist. iv. 49. 1842. 

 Cingula semicostata. Mighels and Adams (not Montagu). Bost. Journ,, 



iv. 49, t. 4, f. 23. 1842. 

 Eisnoa pelagica, Stimpson, Bost. Proc. iv. 15. 



Shell very small, ovate conical, ferruginous, very thin ; whorls 

 five, convex, the upper ones with longitudinal ribs, the lower half 



