236 



LAND AND FRESH-WATER SHELLS OF N. A. [PART 1. 



Pupa variolosa, Godld. — Shell minute, ovate-conical, with a 

 pointed apex, of a yellowish-green color, apparently smooth, but when 

 examined by a considerable magnifying power, is 

 pjo- 404. found to be thickly pitted with dots of unequal size 



and irregularly disposed ; there are four or tive nar- 

 row, tumid wbirls, separated by a profound suture ; 

 the aperture is obliquely semioval, and has a pos- 

 terior lamellar tooth winding within the shell, a 

 tooth on the columella, and another a little to the 

 Pupa variolosa. right of the basal apex; a small umbilical opening 



is covered by the reflected columellar margin of the 

 peristome, and the other margin is slightly everted. Length 2 mill., 

 diam. 1. 



Pupa variolosa, Gould, Proc. Bost. Soc. Nat. Hist. Ill, 40; Terr. Moll. If, 

 331, pi. Ixxii, f. 3.— Pfeiffek, Mon. Hel. Viv. Ill, 55(j.— W. G. 

 Bin NET, Terr. Moll. IV, 146. 



East Florida. 



Pupa pentodon, Say. — Shell subperforate, of an elongated ovate 

 form, minutely striated, and of a spermaceti, or whitish horn-color ; whirls 

 about five, well rounded, and separated by a deep suture ; apex rather 

 acute ; aperture oblique, nearly semicircular ; peristome sharp, and some- 

 what expanded, but not reflexed ; the submargin of the throat is thickened 

 by a ridge of white callus, on which the denticles are situated ; one of these, 



Fig. 405. 



Fig. 406. 



Pupa pentodon. 



and sometimes two, is on the parietal wall, two on the columellar portion 

 of the peristome, and two constantly, and from one to five others occasion- 

 ally, on the other portion of the peristome ; of these, that near the middle 

 of the parietal wall is largest, that at the upper part of the columellar is 

 next, and one opposite the first, on base of the aperture, is the third in 

 size. Length 2, diam. 1 ; of aperture, length § mill. 



Vertigo pentodon, Say, Journ. Acad. Nat. Sci. Phila. II, 376 (1822) ; ed. 

 BiNNEY, 27. 



Pupa pentodon, Gould, Bost. Journ. Nat. Hist. IV, 353, pi. xvi, f. 10, 11 



