426 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



15. GOULD, in Terr. Moll., II. 65, 72, PI. LXVII. b, Fig. 2. W. G. BIN- 

 KEY, Terr., Moll., IV. 35 ; L. & Fr.-W. Sh., I. 266 (1869). MORSE, Journ. 

 Portl. Soc., I. 29, Fig. 73; PI. IX. Fig. 74 (1864); Anier. Nat., I. 606, Fig. 

 46 (1868). TRYON, Amer. Journ. Conch., II. 230 (1866). GOULD and BIN- 

 KEY, Inv. of Mass. (2), 448 (1870). 

 Succinea obliqua, teste BINNEY, 1. c. 



New England and New York ; in Interior and Northern Regions. 

 Generally considered a variety of 5. obliqua. It is a thinner and more 

 fragile shell, proportionally more ventricose in form, with a shorter spire and 



Fig. 303. 



Lingual membrane of S. Totteniana (Morse). 



larger aperture ; it has a decided green color, almost unshaded with yellow, 



while in S. obliqua the amber yellow predominates. 



By Gwynn Jeffreys referred to S. putris var. (Ann. Mag. Nat. Hist., 1872). ' 

 Jaw arcuate, ends blunt ; anterior surface with three heavy ribs, modifying 



the concave and convex margins. (See p. 415.) 



The lingual membrane is said by Morse, whose figure is given above, to 



have 100 rows of 33 1 33 teeth. The bases of attachment are very narrow, 



and have a peculiar expansion at their lower inner angles. 



Succinea campestris, SAY. 

 Vol. III. PI. LXVII. b, Fig. 1. 



Shell yellowish-white, or yellowish horn-color, rounded-ovate ; periostraca 

 shining, wrinkled; whorls 3, not oblique, the last whorl large and ventricose, 

 the other two constituting the spire ; spire short, with acute apex ; aperture 

 ample, not much elongated, rounded anteriorly ; peristome thin and sharp. 

 Length 15, of aperture 10 mill. 



Succinea campestris, SAY, Journ. Acad. Nat. Sci. Phila., I. 281 (1817) ; Nich. 

 Encycl., 3d ed. (1819); BINNEY'S ed., 12. FERUSSAC, Tabl. Syst., 31, PI. 

 XI. Fig. 12. PFEIFFER, Symbols, II. 56 (excl. syn. GOULD) ; Mon. Hel. 

 Viv., II. 524 (excl. do.) ; III. 15 (excl. syn. DEKAY) ; in CHEMNITZ, ed. 2, 48, 

 PL V. Figs. 5, 6 (1854). DESHAYES, in FER., II. 139. BINNEY, Terr. Moll., 

 II. 67, PI. LXVII. b, Fig. 1. W. G. BINNEY, Terr. Moll., IV. 32 ; L. & Fr.- 

 W. Sh., I. 266 (1869). TRYON, Am. Journ. Conch., II. 231 (1866), not of 

 , ADAMS, LINSLEY, ANTHONY, PRESCOTT ( no desc.). 



