174 



A MANUAL OF AMERICAN LAND SHELLS. 



species have not ouly these two teeth, but also two other smaller ones 

 within the aperture and one on the columella. 

 Animal unobserved. 



Pupa alticola, Ingersoll. 



Shell perforate, straight, two and one-half times as long as broad, 

 Fig. 166. densely striate, subtranslucent, chestnut-brown, apex 

 obtuse; whorls G or 7, convex, the middle 3 of the 

 spire equal, causing a parallelism in the sides of the shell, 

 the last noticeably greater, expanding toward the aperture, 

 not closely appressed to the body- whorl; suture deeply 

 impressed; ai)erture small, oblique, subtriangular, mar- 

 gins connected by a thin deposit, without internal x)roc- 

 esses; peristome siu)i)le, somewhat reflected over the 



I 



Pupa alticola. 



umbilicus.- 



Cunningham Gulch, Colorado; Rio La Plata. 



It will not be difticult to re(;ognize this species by its parallel sides, 

 base like expansion of the last whorl, coarse incremental lines, and 

 edentate aperture. It seems to be an essentially alpine species, none 

 having been found at an elevation less than 8,000 to 9,000 feet. It 

 was plenty in the localities mentioned above. (Ingersoll.) 



Pupilla alticola, Ingersoll, Bulletin U. S. Geol. Geogr. Surv. of the Terr., No. 2, 

 128 (1875) ; ed. 2 (1876), 391, fig.-W. G. Binney, Terr. Moll., v, 212, fig. 116. 



Animal not observed. 



A species of the Central Region. 



Fig. IGG is drawn from an authentic specimen. 



Family SUCCINID^. 



SUCCINEA. (See below.) 



Siicciiiea lineata, W. G. Binney. 



Shell oblong-ovate, with 3 very convex whorls ; spire elevated, 

 Fig. 167. acute; surface marked with irregular wrinkles of growth, be- 

 * tween which are coarse parallel revolving lines, somewhat re- 

 moved from each other; aperture large, about as long as one- 

 a.iimata. half of the whole length of the shell, oval; columella folded; 



