LIMN.EA. 



475 



Limnoea ampin, Migiiels, Bost. Journ. N. H. iv. 347, pi. 16, figs. \,a,h,c (Apr. 1843) ; 

 Proc. i. 129 (Oct. 1843), not of Haimjiann.*— Whitkaves, Can. Nat. (Apr. 18G3), 

 viii. 112, fig-. 11. — W. G. BiNNEV, Smith. Inst. L. and Fr. W. SIilUs, ii. 30, fig. 34 



(1865). 



Fig. 726. 



L. ampla. 



Shell large, much inflated, sub-oval, rather tliiu, 

 composed of five convex whorls, prominently shoul- 

 dered at the upper part ; epidermis of an obscure 

 olivaceous-green color ; lines of accretion very fine 

 and compact ; transverse lines obscure, appearing 

 serriform under a magnifier, giving the surface the 

 appearance of very delicate lace-work ; suture deep, 

 and in one specimen sub-canaliculate ; spire short 

 and pointed when present ; aperture oblong, very 

 wide at the posterior part, but narrowing rapidly anteriorly and 

 occupying rather more than two thirds the length of the shell ; 

 labrum thin and somewhat reflected ; labium broadly 

 reflected, forming and partially covering an open and 

 very deep umbilicus ; columella fold very prominent ; 

 within it is of a light yellowish-fawn color, with an ob- 

 scure purplish zone, one line in breadth, and about 

 two lines within the aperture. Length, one and three 

 tenths inches ; breadth, one inch ; height, eight tenths 

 of an inch. Divergence of the spire very variable. 



Second Eagle Lake, Maine, N. lat. 47° {Migheh). 



Fig. 726 is a fac-simile of one of Dr. Mighels's. 

 drawn from a specimen from Maine. 



L. ampla. 



Fig. 727 is 



Limnsea elod.es. 



Figs. 146, 147. 



Shell turreted, elongated, dull horn colored; whorls five, convex; suture deep; 

 aperture sub-oval, less than half the length of the shell, within brownish, fold of 

 the columeUa profound. 



Limmens ehdes, Say, Journ. Ac. Nat. Sc. Phil. ii. 169 (1821) ; Am. Conch, iv. pi. 31, fig. 



3 (1832) ; Binney's ed. 66, 188, pi. 31, lig. 3; ed. Chesu, 44, pi. 8, fig. 3. — Kus- 



TEU, in Chemn. 2d ed. 42, pi. 7, figs. 17-21. 

 Limnmi elodfs, Gould, Inv. of Mass. 221, figs. 146, 147 (1841 ). — Adams, Shells of Ver- 



monr, in Tlioms. Hist. 153 (1842). — Anonymous, Can. Nat. ii. 199, fig. (1857). 

 Limncen frag ill's (not of Linnaeus), IIaldeman, Mon. 20, pi. 6, 15, fig. 1 (1842) ; 53, pi. 



14, fig. 1. — De Kay, N. Y. Moll. 68, pi. 4, fig. 68 (1843). 

 Limnoia palustris, Muller (Bncclnnm), &c. — Sheppard (1829), Tr. Lit. Hist. See. Que- 



* Guhmrln ampla, Hartmann, 1842, is referred by Reeve to L. auricularia. Should it 

 prove a distinct species, our shell might be called L. Mighelsi. 



