— 242 — 



Ancylus dcpressus, G. Binney, Check list of Ihe Sliells of 

 North-Ainerica (exfr. Smithso- 

 nian Miscell. coll.), p. 57. 1861. 

 Habite la rivière de Holslon, aux environs de Washing- 

 ton et dans le Massachussets. 



ANCVIiUS PARAXiIiErUS. 



Ancylus parallelus, Haldeman, Monogr. oP the fieshw. 



univ, of United-Stales (sur la cou* 

 verture de la livraison). 1841. 



— — ^(/flrtis, Cat. of (lie Moll. of Middle- 



burg, in y\merican Journ., by Si- 

 liman, vol. XL, p. 275, 1841. 



— rivularis (1), Gould, Report on the in vert, of 



Massachussets,p. 224, f. 153.1841. 



— parallelus, J. de Kay, Zoology of New-York, etc., 



part. V; Mollusca, p. 13. 1843. 



— — Haldeman, Monogr. of the freshw. 



univ. Moll., n" 7, p. 11, pl. 1, f. G. 

 1844. 



— — J. Jay, Catal. of the Shells, p. 272, 



n" 6385. 1850. 



— — Stimjh^on, Shells of New-England, 



p. 52. 1851. 



— — Boiirguignat , Cat. Ane. in Journ. 



Conch., t. IV, p. 180. 1853; et 

 Desc. Ane. in Proceed. zool. Soc. 

 of London, p. 84. 1853. 



— — II. qI A. Adams, Gencr. of récent 



Moll., t. II, p. 265. 1855. 



(1) ^onAncijlus rivularis de Say, Férussac, de Kay, etc., qui est 

 une espôce différente. 



