264 



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



Little Yalley, Washoe County, Nevada, on the eastern slope 

 of the Sierra Nevada, 6500 feet above the sea. 



The original description and figure are given above. 



Fig. 472. 



Succinea 

 verrilli. 



Succinea TCrrilli) Bland. — Shell ovate-conic, thin, striate, snb- 

 pellucid, orange-yellow colored ; spire elevated, obtuse, with globose apex, 

 of a reddish tinge; whirls three, very convex; satnre deep; 

 aperture oblique, roundly oval ; columella arcuate, with a 

 slight callus ; peristome simple, the margins joined with a 

 very thin callus. Length 7, diam. 3| mill. ; aperture 4 mill, 

 long, 3 wide. 



Succinea verrilU, Bland, Ann. N. Y. Lye. VIII, 169, f. 17 

 (1865).— Tryon, Am. Journ. Conch. II, 234, pi. ii, f. 

 15 (1866). 



Salt Lake, Anticosti Island, Gulf of St. Lawrence. 



The original description and figure are given above. 



Buccal plate abruptly arched, with one prominent central pro- 

 jection. 



Lingual formula about 80 rows (31 — 1 — 31). Plates notched 

 at their outer posterior edges, longer than wide ; central plate 

 with three minute denticles, the middle one being largest ; lateral 

 plates bidentate, the outer denticle minute ; uncini irregularly- 

 dentate or notched. 



Animal (in alcohol^ black. 



Fit'. 473. 



Succinea aurea. Lea. — Shell very symmetrical in form, elongated 

 oval, the texture very thin and lucid, and of a clear amber 

 color ; whirls three, the suture deeply impressed, and the 

 whirls a little tabulated posteriorly; aperture navrow-ovate, 

 acute posteriorly ; the columella has an indistinct fold. 

 Length 72, breadth 3 mill. 



Succinea aiirea, Lea, Trans. Am. Phil. Soc. IX, 4 ; Obs.' IV, 

 ' 4 (1844) ; Proc. 1841, II, 32.— Pfeiffer, Mou. Hel. Viv. 

 II, 325.— BiNNEY, Terr. Moll. II, 76, pi. Ixvii, c, f. 3.— 

 W. G. BiNNEY, Terr. Moll. IV, 37.— Tkyon, Am. Journ. 

 Conch. II, 241, pi. ii, f. 33 (1866). 

 Succinea ovalis, var., Anthony, Shells of Ohio (1843), No. 45, no«descr. 



Ohio. 



