190 HELIX-SOLAROPSIS. 



H. QUADRIVITTATA Hidalgo. PI. 52, figs. 92, 93. 



Covered perforate, depressed, thin, striatulate, and under a lens 

 minutely granulate, corneous-brown, four-banded with chestnut- 

 color, irregularly spotted and streaked with white ; spire plane ; 

 suture impressed ; whorls 4, convex, rapidly increasing, the last 

 large, inflated, obtusely biangulate above, not descending in front ; 

 aperture lunate-circular, large, concolored ; peristome thin, termina- 

 tions joined by a very thin callous, basal margin a trifle reflexed, 

 columella dilated, reflexed, covering the perforation. (Hidalgo.} 



Alt. 11, diam. maj. 19, inin. 15 mill. Aperture inside 11 mill, 

 long, 11 wide. 



Baeza, Ecuador. 



H. quadrivittata HIDALGO, Journ. de Conchyl. 1869, p. 410 ; 1. c. 

 1870, t. 6, f. 1 ; Mol. Viage al Pacifico, p. 10, t. 2, f. 6, 7. PFEIFFER, 

 Monog. Hel. Yiv., vii, p. 274. 



This shell bears much resemblance to H. andicola Pfr. From 

 that species it may be distinguished easily by the characters of the 

 umbilicus, the narrower aperture, the disposition and number of the 

 bands, and especially by the angulation of the last whorl. (Hidalgo.} 



H. DIPLOGONIA Dohrn. Uniiqured. 



t.' Kf 



Umbilicate, depressed, thin, all over granulate, corneous-white, 

 painted with three narrow interrupted bands and sparcely spotted ; 

 spire a little elevated, apex plane ; suture profound ; whorls 4 to 4*, 

 angulate near sutures and periphery, subplane between the angles ; 

 the last whorl is convex beneath, narrowly compressed around the 

 umbilicus, scarcely descending anteriorly ; aperture a little oblique, 

 truncate-oval ; peristome thin, margins joined by a thin callous, the 

 right margin a little expanded, basal subreflexed, columellar dilated. 

 (Dohrn.} 



Alt. 11, diam. maj.- 19, min. 16 mill.; aperture width 11 mill. 



Eastern Peru. 



Solaropsis diplogonia DOHRN, in Jahrb. d. deutsch. Mai. Gesell. 

 1882, p. 101. 



It stands very near to H. andicola Pfr., but the 3 examples have 

 two angles on the whorls, not shown by Pfeiffer's species. H. quad- 

 rivittata Hidalgo is still more nearly allied, but has the columellar 

 expansion broader, covering the umbilicus. 



