HELIX-SOLAROPSIS. 195 



surface covered with granules arranged in regular oblique rows, 

 bearing short hairs; spire plane; whorls 4i, 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. 11 i, diam. maj. 18, min. 15 mill. Aperture, greatest width 

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



Hills between the rivers Tilorio and Zhorquin, 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 Iiians. 

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



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



Umbilicate, 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 4|, very convex, the last rounded, a little 

 descending in iront; 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 

 plicse 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 in 

 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. 



