442 helicidj:. 



Vertigo Bollesiana. 



Shell C3dindriccal ovate ; whorls four, sub-convex ; aperture sub-orbicular ; teeth 

 five; minutely perfoi-ate. 



Islhmia Bollesiana, Morse, Ann. N. Y. Lye. viii. 209, figs. 4-6 (Nov. 1865). 

 Vertigo Bollesiana, Mokse, Am. Nat. i. 669, figs. 63, 64 (1868). 



^'"- ™^- Shell minutely perforate, cylindrical-ovate, 



delicately striated, sub-translucent ; apex ob- 

 tuse ; suture well-defined ; whorls four, sub- 

 convex ; aperture sub-orbicular, somewhat 

 flattened on its outer edge ; with five teeth, 

 one prominent and rather curved on the 



V. Bollesiana. . . . ., . „ 



parietal margin, two similar in form, the 

 lower one the smaller, on the columellar margin, and two slightly 

 elevated lamelliform teeth within and at the base ; peristome sub- 

 reflected and thickened. Length, sixty-five thousandths of an inch; 

 breadth, thirty-five thousandths of an inch. (^Murse.') 

 New England ; New York ; Virginia. 



Vertigo ovata. 



Fig. 119. 



Shell ovate-conic, amber colored ; whorls five or six, convex, wrinkled ; aper- 

 ture semi-oval, broader than long; teeth five; umbilicus distinct. 



Vertli/o ovata, Say, Journ. Acad. Nat. Sc. ii. 375 (1822); cd. Binney, 26. — Binney, 



Terr. Moll. ii. 334, pi. 71, fig. 4. — W. G. Binney, Terr. Moll. iv. 148. — Morse, 



Am. Nat. i. 668, figs. 57, 58 (1868). 

 Pupa ovata, Gould, Best. Journ. N. H. iv. 350, pi. 16, figs. 7, 8 (1843).— De Kay, 



N. Y. Moll. .50, pi. 4, fig. .50 (1843). — Adams, Vermont Moll. 157 (1842); Sillim. 



Journ. [1] xl. 271. — Kuster, in Chemv. ed. 2, 118, pi. 14, figs. 1, 2; pi. 15, figs. 



35-38. — Pfeiffeu, Mon. Hel. Viv. ii. 360; Symb. ii. 54. 

 Pupa morlesta, Say, Lonj^'s Ex. ii 25, pi. 15, fig. 5 (1824) ; ed. Binney, 32, pi. 74, fig. 5. 



— Gould, Inv. 188, fig. 119 (1841). 

 Pupa ovulnm, Pfeiffer, olim, Symb. 46. 

 Islhmia ovata, Morse, Journ. Portl. Soc. i. 38, fig. 93 ; pi. 10, fig. 94 (1864). 



Shell minute, ovate-conic, thin, amber colored, whorls five ; some- 

 times six, minutely wrinkled, well-rounded, and defined by a deep 

 suture, gradually diminishing to a rather acute apex ; aperture about 

 half the breadth of the last whorl, slightly oblique; rather broader 

 than long ; semi-oval, but modified by an inflection of tlie outer lip ; 

 lip simple, not reflected, joining the preceding whorl behind, by a 

 curve ; teeth five, slender, sharp and direct, like the teeth of a 



