262 



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



Fig. 467. 



Succiiiea lineata, W. G. Binn.— Shell oblong-ovate, with three 

 very convex whirls ; spire elevated, acute ; surface marked with irregular 

 wrinkles of growth, betweeu which are coarse parallel revolving lines, 

 somewhat removed from each other ; aperture large, about as 

 long as one-half of the whole length of the shell, oval ; colu- 

 mella folded; a deposition of callus on the parietal wall of 

 the aperture. Greatest diam. 6, alt. 12 mill. 



Succinca Uneata, W. G. Binney, Proc. Acad. Nat. Sci. Philad. 

 1857,19; Proc. Bost. Soc. Nat. Hist. VI, 155 (April, 

 1857) ; Terr. Moll. IV, 38, pi. Ixxx, f. 5.— Teyon, Am. 

 Journ. Conch. II, 235, pl. ii, f. lb" (1866). 



Fort Union, Nebraska Territory. 



Succinea avara, Say. — Shell rather small, very thin and fragile, 

 straw-colored, rosy, amber-colored or greenish ; periostraca shining, or 

 presenting minute hairy processes in the young ; whirls three, very con- 

 vex, separated by a deep suture ; last whirl rather large, not 

 Fig. 468. much expanded ; spire very prominent, acute ; aperture ovate, 

 rounded at both extremities, about half as long as the shell. 

 Extreme length about 6 mill. 



Succinea avara, Say, Long's Exped. II, 260, pl. xv, f. 6 

 (1822) ; Binney's ed. 32, pl. Ixxiv, f. 6.— Gould, In- 

 vertebrata, 196, f. 127 (1841).— Adams, Shells of Ver- 

 mont, 156 (1842).— DeKay, N. Y. Moll, 54, pl. iv, f. 55 

 (1843).— Pfeiffek, Symbols, II, 56; Mon. Hel. Viv. II, 

 525 ; in Chemnitz, ed. 2, 51, pl. v, f. 18-20 (1854),— Binney, Terr, 

 Moll, II, 74, pl. Ixvii, c, f. 4.— W. G. Binney, Terr, Moll. IV, 35.— 

 Morse, Journ, Portl. Soc. I, 29, f. 75 ; pl. ix, f. 76 (1864) ; Anier. 

 Nat, I, 607, f. 47 (1868),— Tkyon, Am. Journ, Conch. II, 233, pl. ii, 

 f. 11, 12 (1866). 

 Succinea warcUana, Lea, Proc. Am. Phil. Soc. 1841, II, 31 ; Trans. IX, 3; 



Obs. IV, 3 (1844).— Pfeiffek, Mon. Hel. Viv. II, 525. 

 Succinea vermeta, Say, teste Gould (see doubtful species, p. 271). — Tkyon, 

 Am. Journ. Conch. II, 233, pl. ii, f. 10 (1866). 



