EASTEKN PROVINCE INTERIOR REGION SPECIES. 207 



attachment. Lateral teeth of same type as centrals, but bicusi)id; 

 there are about 9 perfect laterals. Marginals aculeate, as usual in the 

 genus. (Terr. Moll., V, Plate II, Fig. K.) 



The penis has the same arrangement as in Z. Icvvigatus. The geni- 

 tal bladder is large, globular, on a short, narrow duct. (See Ann. K 

 Y. Ac. of Sc, I, Plate XIV, Fig. C.) 



The species is readily distinguished from Z. friabilis, la'vigatus, and 

 fuUginosus by the number of the lateral teeth on its lingual membrane. 

 Zoiiites fuligiiiosus, Gkiff. 



Shell thin, depressed on the upper surface, epidermis dark, approach- 

 ing to chestnut-color, sometimes almost black, shin- fig. 217. 

 ing and wrinkled ; whorls 4i, rapidly increasing, 

 with irregular, oblique wrinkles, the last whorl very 

 voluminous and expanding transversely towards 

 the aperture; suture very little impressed; aperture 

 very oblique, ample, lunate-ovate, within pearly or 

 iridescent; peristome simple, thin, brittle, with a 

 light, testaceous deposit within, the two termina- 

 tions approaching each other very nearly, that of 

 the columella somewhat reflected ; umbilicus deep, zonUes/uUginosus. 

 not much expanded. Greater diameter 26, lesser 22™"' ; height, 13""". 



Helix fuliginosa, Griffith, iu letters,— Binney, Terr. Moll., ii, 222, pi. xxxi (1851); 

 Bost. Jouru. Nat. Hist., iil, 417, pi. xsiv, excl. syn. (1840).— Leidy, T. M. U. 

 S., i, pi. ix, fif?. 4 (auat.).— Adams, Shells of Vermont, 161, excl.syu. (1842).— 

 De Kay, N. Y. Moll., 37, pi. iil, lig. 22 (1843).— Pfeiffer, Mou. Hel. Viv., i, 

 88; iu Chemnitz, ed. 2, ii, 104, pi. Ixxxiv, iigs. 1-3.— Reeve, Cou. Icou., 675 

 (1852).— W. G. Binney, Terr. Moll., iv, 105.— Morse, Amer. Nat., i,315, iigs. 

 23, 24 (1867). 



Helix capillacea, Pfeiffer, Synibola), ii, 24, uot F^:r., teste Per. 



Omphalina cuiyrea, Rafinesque, Enum. & Ace. 3; ed. Binney and Tryon, 67. 



Hyalina fuliginosa, Tryon, Am. Journ. Couch., ii, 248 (1866). 



.^onites fuUginosus, W. G. Binney, L. & Fr.-W. Sh,, i, 286 (1869) ; Terr. Moll., v, 100.— 

 Fischer and Crosse, Moll. Mex., 164 (1870). 



A Post-Pliocene species. It now reaches its greatest development 

 in the Cumberland Subregion, but it may extend over all the Interior 

 Eegion. The extreme points from which I have actually received it 

 are Canada, north shore of Lake Superior, and Volusia County, Florida. 

 It is quoted doubtfully from Mexico, on what seems to me most unsatis- 

 factory authority. I have never received it west of the Mississippi 

 Eiver to the south of Iowa. In all that southwestern region it seems 

 to be replaced by Z.friaMlis, a species which, on the other hand, does 

 not extend, as does fuUginosus, northeasterly beyond the Appalachian 

 chain. 



