HYALINA. 



45 



ed. 19.— BiSNEY, Bost. Jouru. Nat. Hist. Ill, 412, pi. xx, f. 1 (1840) ; 



Terr. Moll. II, 204, pi. xxxv.— Leidy, T. M. U. S. I, 257, pi. xii, f. 



4-7 (1851), anat.— DeKay, N. Y. Moll. 40, excl. fig. ? (1843).— 



Chemnitz, 2d ed. I, 108, pi. xxxiii, f. 5-7. — Deshayes in Fer. I, 



1S4. — Pfeiffer, Mod. Hel. Viv. I, 48. — Reeve, Con. Icon. 493 



(1852).— W. G. BiXNEY, Terr. Moll. IV, 95. 

 Helix rqfinesqitea, Fekussac, Tab. Syst. 50 ; Hist. pi. li, a, fig. 5 ; pi. 1, ' 



a, f. 4, 5 ?— Pfeiffer, Symb. I, 30. 

 Edix wardinna, Lea, Trans. Am. Phil. VI, 67, pi. xxiii, f. 82; Obs. II, 



ti7 (1839).— Troschel, Arch. f. Nat. 1839, II, 221.— DeKay, N. Y. 



Moll. 46. ' 

 Mesomphix ligera, Tryon, Am. Journ. Conch. II, 255, pi. iv, f, 34 (1866). 



From Arkansas and Georgia to the Great Lakes; north of 

 Maryland it does not appear east of the Appalachian chain. It 

 is also found fossil in the postpleiocene of the Mississippi Yalley. 



Jaw (see Terr. Moll. I, pi. xii, f. 7) strongly arcuate, ends 

 rounded ; anterior surface striated ; concave margin with a well- 

 developed median projection. 



Fig. 71. 



Hyalina deiuissa, Binxey. — Shell perforated, depressed-convex; 

 epidermis yellowish horn-color, shining; whirls six, with minute lines 

 of growtli ; spire obtuse ; suture impressed ; body-whirl ex- 

 panding very little towards the aperture ; aperture transverse, 

 not large, slightly oblique ; a white, testaceous deposit within ; 

 peristome thin, acute ; base rather flat, smooth ; perforation 

 very small ; umbilical region a little impressed. Greater diam. 

 llj, les.-<er lOi ; height 6 mill. 



Helix (lemissa, Binney, Bost. Journ. Nat. Hist. IV, 361, pi. 

 xvi, f. 16 (1843) ; Terr. Moll. II, 232, pi. xlii, f. 1.— 

 Pfeiffer, Mon. Hel. Viv. I, 58 ; IV, 48. — Reeve, Con. 

 Icon. no. 1491.— W. G. Binney, Terr. Moll. IV, 116. 

 Mesomphix demissa, Tryon, Am. Journ. Conch. II, 255, pi. iv, f. 35 (1866). 



Western Pennsylvania, Xorth Carolina, Georgia, Tennessee, 

 Alabama, and Arkansas. 



