— 239 — 



ANCTLUS NUTTAII. 



Ancylus Velletea Nuttalii, Haldeman, New spec. of Shells 

 published mardi 13^'' 1841 ; 

 in Monogr. freshw. univ. 

 Moll. of the United-States, 

 n" of july 1841. 



— Nutlalii, de Kay, Zoology of New - York , 



part. V, Mollusca, p. 13. 

 1843. 



— __. Bourguignat , Cat. Ane. in 



Journ". Conch.,t. IV,p. 199. 

 1853. 



Acroloxus Nultalii, H. et Â. Adams, Gênera of récent 

 Mollusca, t. II, p. 267. 1855. 

 Ancylus Nuttalii, G. Binneij, Check list of >he Shells of 

 North-America (extr. Smith- 

 sonian Miscell. collect. ), 

 p. 57. 1861. 

 Habite dans l'Orégon, aux États-Unis (Nuttal). 



ANCTX.US OBSCURUS. 



Ancylus obscurus, //a/dcman, Monogr. freshw. univ. 



Moll. of the United-States, p. 9, 

 pl. 1, fig. 5. (Janv.) 1844. 

 — — B. Adams, Cat. freshw. Shells which 



inhab. Jamaica, in Cont. to Con- 

 chol., n° 3, p. 45. (Octob.) 1849. 



