HELIX-SOLAROPSIS. 193 



Conch., p. 232. H. planorbis JAY, Catalogue, p. 112, t. 1, f. 6, 7 

 (1839). Eyryompliala monile BECK, Index, p. 8. Psadara boetzkesi 

 MILLER, Malak. Blatter, xxv, p. 163, t. 7, f. 4. 



More broadly umbilicated than any other described species of this 

 group. I agree with Dr. Dohrn in considering Psadara boetzkesi of 

 Miller (PI. 54, figs. 27, 28, 29) doubtfully distinct, and in any case 

 insufficiently characterized. 



H. CASTELNEAUDII Deville et Hupe. PI. 54, figs. 21-23. 



Umbilicate, depressed, thin, diaphanous, a little shining, tawny, 

 with a series of subquadrangular reddish spots at the suture, and an 

 interrupted band below ; spire nearly flat ; suture profound ; whorls 

 5, convex, granulate, the last scarcely descending, obliquely rugose- 

 plicate, more convex beneath ; umbilicus open, equaling one-sixth 

 the diameter of shell, funnel-shaped; aperture a little oblique, 

 rounded-lunar, margaritaceous inside ; peristome narrowly expanded, 

 margins converging, columella dilated above. (Pfr.) 



Alt. 62, diam. maj. 18, min. 15i mill. 



Mission of Sarayacu, Peru. 



H. castelneaudii DEVILLE ET HUPPE in Rev. et Mag. de Zool. 

 1850, p. 639, t. 14, f. 3. PFR. Mon. Hel. Viv., iii, p. 248. H. 

 Castelnaudii HUPE in Casteln., Exped. dans FAmer. du Sud, Moll., 

 p. 11, t. 2, f. 4. H. castelnaui PFR. in Malak. Blatter, v, p. 159 ; 

 Monographia Hel. Viv., iv, p. 295. MARTENS, Malak. Blatter, 

 xiv, p. 134. 



H. SELENOSTOMA Pfeiflfer. PL 52, figs. 1, 2, 3. 



Umbilicate, depressed, thin, fragile, translucent, light brown, with 

 a series of chestnut spots below the suture, and with or without 

 several interrupted narrow brown bands; surface covered with 

 granules arranged in oblique rows (and according to PfeifFer, short 

 hairs), smoother around the umbilicus ; spire plane, whorls 4i, very 

 convex, separated by profound sutures, the last convex ; aperture 

 lunar, a little oblique ; peristome thin, white, narrowly expanded 

 all around, subreflexed below, and slightly expanded at the 

 umbilicus ; umbilicus very narrow inside, funnel-shaped, width 2? to 

 3 mill. 



Alt. 11, diam. maj. 26, min. 21 mill. 



Alt. 11, diam. maj. 24, min. 19 mill. ; aperture, greatest width 14, 

 alt. 12 2 mill. (Meas. outside peristome.) 



Gualeot and Valley of Pilaton, Ecuador. 

 13 



