HELIX-SOLAROPSIS. 195 



surface covered with granules arranged in regular oblique rows, 

 bearing short hairs; spire plane; whorls 4\>, very convex, separated 

 by profound sutures, the last wide, inflated ; aperture nearly vertical, 

 lunar, narrow, embracing a considerable part of the penultimate 

 whorl ; peristome very narrowly expanded, columellar margin 

 dilated and partly covering the umbilicus; umbilicus narrow, width 

 H mill. 



Alt. 1H, diam. maj. 18, min. 15 mill. Aperture, greatest width 

 12, alt. 11 mill. (Meas. outside peristome.) 



Hills between the river* Tilorio and Zkorquin, Costa Rica. 



H. (Solaropsis) tiloriensis ANGAS, Proc. Zool. Soc. Lond., 1879, p. 

 477, t. 40, f. 2. 



This form has a narrower aperture than H. selenostoma or Itians. 

 If. iris Miller is similar in form, but different in coloration. 



H. IRIS Miller. PI. 56, figs. 6, 7, 8. 



Urnbilicate, orbicular-depressed, very thin, diaphanous, shining, 

 corneous, maculate with tawny, above with irregular reddish streaks, 

 body with two interrupted spiral bands ;' surface pilose (or granulate) ; 

 spire plane ; whorls 4J, very convex, the last rounded, a little 

 descending in front; aperture rounded-lunar, a little oblique, peri- 

 stome thin, expanded, above broadly expanded, ascending, columel- 

 lar margin dilated, partly covering the umbilicus, the margins con- 

 verging, scarcely connected by a callus. (Miller.) 



Alt. 11-13, diam. maj. 23-25, min. 19-21 mill. 



Valley of Pilaton, Ecuador, 1000 meters alt. 



Psadara iris MILLER, Malak. Blatter, xxv, 1878, p. 163, t. 7, f. 3. 



Close to H. tiloriensis, but different in coloration etc. Fig. 6 of 

 my plate is incorrect in lacking an umbilicus. It should be 2 mill, 

 wide, a trifle impinged upon by the expansion of the columellar lip. 



H. RUGIFERA Dohrn. Unfigured. 



Broadly umbilicate, deplanate, thin, obliquely rugose-plicate, the 

 plicae vanishing beneath, brownish-corneous, flammulate at the sut- 

 ures and narrowly 2-banded in the middle of the whorl with 

 reddish; spire plane, apex rather smooth ; suture moderately pro- 

 found ; whorls nearly 5, convex, the last rounded, not descending i'u 

 front ; umbilicus equaling i the diameter, funnel-shaped ; aperture 

 a little oblique, rounded-lunar ; peristome [unknown]. (Dohrn.) 



Alt. 12, diam. maj. 26, min. 22 mill. 



Eastern Peru. 



