SUCCINEA. 447 



Mackenzie River to the Gulf of ]\[exico, over all Eastern North 

 America. 



I have nuicli hesitation in deciding upon a name for this shell. 

 It is quite different from any other species I am acquainted with. 

 The spire is longer, and acutely pointed, the body whorl less de- 

 veloped, and the aperture is shorter and more rounded ; Init, al- 

 though the suture is deep, it is not so much so as to " give the 

 whorls the appearance of being almost separated from resting on 

 each other," as Mr. Say remarks of ;S. vermeta. In this character, 

 individuals differ very greatly. Some specimens with unusually lax 

 spires may have been used by Mr. Say in drawing up his descrip- 

 tion. But the young shells present no prominent spire, and a large, 

 rounded aperture, agreeing precisely with Mr. Say's description and 

 figure of S. avara; and they are also always coated with earth ad- 

 hering to a glutinous matter on the surface. It seems probable that 

 the two should form one species ; unless they do, I am at a loss un- 

 der which name to place our shell, as, considering specimens of all 

 ages and forms, it will come under one as well as the other. The 

 name I have chosen is to be preferred, because it is a legitimate 

 Latin word, while the other is not. 



The animal has a dark head, and gives a dark color to the shell ; 

 the foot is very narrow, with a flesh-colored tint. 



Succinea obliqua. 



Fig. 126. 



Shell ovate, thin, transparent, pale yellow; whorls three, not very oblique, 

 very convex ; the last very large and turgid ; suture deep ; aperture sub-oval. 



Succinea obliqua, Say, Long's Exped. ii. 260, pi. 15, fig. 7 (1824) ; Bixxet's erl. 32, pi. 

 74, fig. 7. — Adams, Vermont Moll. 156, with fig. (1842). — De Kay, N. Y. JIoll. 

 53, pi. 4, fig. 53 (1843). — Pfeiffer, Mon. Hoi. Viv. iii. 15; in Chemxitz, 2d ed. 



47, pi. .5, fig^. 1, 2 (18.i4). — BiNXEY, Terr. Moll. ii. 69, pi. 67 6, fig. 3, excl. syn. 

 Tottenianci. — W. G. Bixney, Terr. Moll. iv. 35 ; Terr. Moll. U. S. i. 258, pi. 13, figs. 

 1-3 (1851), anat. — Tryox, Am. Journ. Conch, ii. 232 pi. 2, fig. 7 (1866). 



Succinea ovalis, Say, ,J. Ac. N. S. i. 15 (181 7) ; Nich. p:ncyc. 3d ed. (1819): Bixxey's 

 ed. 8. — Adams, Vermont Moll. 156 (1842). — Deshayes, in Encyc. IMe'tli. ii. 20 

 (1830); Fer. Hist. 1. c. ii. 139 (excl. syn. Gould); in Lam. 2d ed. viii. 319.— 

 Pfeiffer, Mon. Hel. Viv. ii. 524 ; iii. 15 (excl. syn. Gould) ; in Chemxitz, 2d ed. 



48, pi. 5, figs. 3, 4. 



Succinea lin-nla, De Kay, N. Y. Moll. 53, pi. 4, fig. 51 (olim), 1843. 



Succinea cnmpestris, of all American authors except Say. — Gould, Iiiv. 195, fi"-. 126 



(1841). -De K.\y, N. Y. Moll. 54, pi. 4, fig. .54 (1843). 

 Succinea Greerii, Tryon, Am. Journ. Conch, ii. 232, pi. 2, fig. IS (1866). 



