80 



LAND AND FRESH-WATER SHELLS OF N. A. [PART L 



Syst. 44; Hist. Nat. des Moll. pi. Ixxix, f. 7. — Deshayes in Lam. 

 VIII, 130 ; 3d ed. Ill, 31.5 ; in Fer. I, 81.— Chemnitz, 2d ed. II, 114, 

 tab. Ixxxv, f. 30-32 ; Pfeiffek, Mon. Hel. Viv. 1, 103 ; III, 99 (excl. 

 H.JilioIa).— Reeve, Con. Icon. G95.— W. G. Bixney, Terr. Moll. IV, 

 122.— Leidy, T. M. U. S. I, 153, pi. vii, f. 4-7 (1851), anat. 



Helix patula, Desuayes, Encycl. Meth. II, 217 (1830). 



Angidspira perspectivu, Tkyon, Am. Jonrn. Conch. II, 262, pi. iv, f. 50 

 (1866). 



North of Maryland it is not found east of the Appalachian 

 chain, but elsewhere is probably found over the whole of eastern 

 North America. Also in the postpleiocene of the Mississippi 

 Valley. 



Helix striatella, Anthony. — Shell nmbilicated, orbicularly-con- 

 vex, thin, brownish horn-color, with crowded ribs ; whirl.s four, scarcely 



convex, the last inflated below, rather wide ; umbilicus large, 

 Fi?. 140. pervious, aperture subcircular; peristome simple, acute, its 



terminations approached. Greater diam. G, lesser 5^ ; height 



3 mill. 



Helix striatella, Anthony, Bost. Journ. Nat. Hist. Ill, 278, pi. 

 iii, f. 2 (1840).— Binney, Bost. Journ. Nat. Hist. 111,432, 

 pi. xxi, f. 5 (1840) ; Terr. Moll. II, 217, pi. xxx, f. 2.— 

 Gould, Invert. 178, f. 112 (1841). —Adams, Vermont 

 MoUusca, 162 (1S42).— DeKay, N. Y. Moll. 43, pi. iii, f. 

 40 (1843).— Chemnitz, 2d ed. II, 115, tab. Ixxxv, f. 

 36-38.— Pfeiffek, Mon. Hel. Viv. I, 104.— Reeve, Con. Icon. 727 

 (1853).— W. G. Binney, Terr. Moll. IV, 99.— Mouse, Amer. Nat. I, 

 545, f. 40 (1867). 

 Helix ruderata, Adams, Sill. Journ. [i] 40, 408, not Studer. 

 Helix cronl-heitei,^ Newcomb, Proc. Cal. Acad. Nat. Sci. Ill, 180 (1865). 

 Patula striatella, Morse, Journ. Portl. Soc. I, 21, f. 48, pi. ii, f. 6 ; pi. viii, 



f. 49 (1864). 

 Anguispira striatella, Tryon, Am. Journ. Conch. II, 262, pi. iv,f. 51 (1866). 

 Patula cronhheitei, Tryon, Am. Journ. Conch. II, 263 (1866). 



' My opinion of this species is formed from the description alone. I 

 have seen no authentic example. 



