44 



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



surface, paler on the posterior extremity and base ; collar grayish- 

 wliite ; foot narrow, exceeding in length twice the transverse 

 diameter of the shell ; eye-peduncles long and slender. 



Fig. 69. 



Hyalina intertexta. 



Hyaliua intertexta, Binney. — Shell perforated, subpyramidal ; 

 epidermis yellowish horn-color; whirls six to seven, with numerous, fine, 

 oblique strife, and very minute, spiral strife, intersecting 

 each other ; outer whirl with a narrow, light-colored 

 band, and an ill-defin«d, brownish band below it ; aper- 

 ture rounded, a little transverse ; peristome thin, some- 

 what thickened within by a deposition of testaceous 

 matter, its columellar extremity slightly reflected at its 

 junction with the base of the shell ; perforation small, 

 sometimes nearly obsolete ; base whiter than the upper 

 surface. Greater diam. 15, lesser 13} ; height 10 mill. 



Helix intertexta, Binxey, Bost. Journ. Nat. Hist. Ill, 413, pi. xx, f. '2 

 (1840) ; Terr. Moll. II, 206, pi. xxxvi.— Puiuppi, Icon. II, 9, p. 5, 

 pi. vi, f. 16.— -Chemxitz, 2d ed. I, 20S, pi. xxxiii, f. 8-10.— Pfeiffer, 

 Mon. Hel. Viv. I, 49.— Reeve, Con. Icon. 66S (1852).— Leidy, T. M. 

 U. S. I, 257, pi. xii, f. 1-3 (1851). anat — DeKay, N. Y. Moll. 38, 

 pi. iii, f. 29 (1843).— W. G. Binney, T. M. IV, DU. 



Mesomphix intertexta, Tkyon, Am. Journ. Conch. II, 254, pi. iv, f. 33 

 (186G). 



New York to Indiana ; Tennessee to Georgia ; also found iu 

 the postpleiocene beds in the Mississippi Yalley. 



The specimen figured is unusually large. There is a smaller, 

 strongly carinated variety with a short, conical spire. 



Fig. 70. 



Hyalina ligera, Say. — Shell perforated, orbicularly-convex : epi- 

 dermis yellowish horn-color, shining; whirls seven, finc^ly and thickly 

 striated transversely, smooth below ; suture not much im- 

 pressed ; aperture semilunate, rounded ; peristome thin, 

 acute ; base and side of the outer whirl, witliin the aper- 

 ture, thickened and white ; perforation very small ; um- 

 bilical region impressed. Greater diam. 15, lesser 13; 

 height 10 mill. 



Hyalina liatra. Helix ligera, Say, Jonrn. Acad. II, 157 (1821) ; Bi.nney's 



