HELIX-SOLAROPSIS. 183 



stoine reflexed all around, thickened on the base, dilated half over 

 the umbilicus ; parietal callous transparent, thin. 



Alt. 28, diam. maj. 60, min. 51 mill. ; umbilicus 82 mill. 



Alt. 27, diam. maj. 63, min. 54 mill. 



Marmato, etc., New Grenada. 



H. gibboni PFR. Symbolse, iii, p. 37 ; Krister's Conchyl. Cab., p. 

 213, t. 107, f. 10 ; Mon. Hel. Viv., i, p. 374. BLAND, in Adam's 

 Contrib. to Conch., p. 231. REEVE, Conch. Icon., f. 539. H. 

 magnifica LEA, Obs. gen. Unio, etc., ii, p. 89, t. 23, f. 88 (not magnifica 

 Per.). H. amori HIDALGO in Journ. de Conchyl., 1867, p. 71, 1. 1, 

 f. 3 ; Viage al Pacifico, Mol., p. 7, t. 1, f. 1-3. DOHRN, Jahrb. d. 

 Mai. GeselL, ii, p. 298. MOUSSON, Malak. Blat. 1873, xxi, p. 2. 

 Solaropsis amori COUSIN, Faune Mai. de la Rep. de 1'Equateur, p. 

 67. 



This shell differs from all the preceding in being striate but not gran- 

 ulate. The tip of the apex is slightly sunken ; and the color-pattern is 

 more elaborate generally than the other species, though sometimes 

 it is decidedly obscure and mottled as in the specimen figured in fig. 

 86. The spire is often less obtuse than the specimens shown in my 

 figures. The H. amori of Hidalgo is merely a variety as Dohrn has 

 already pointed out. 



Var. AMORI Hidalgo. PI. 52, figs. 94, 95. 



Larger, with more numerous spiral series of spots below the 

 periphery ; often becoming confluent into zigzag streaks there. 



Alt. 30, diam. maj. 79, min. 63 mill. ; umbilicus 6 mill. 



Alt. 40, diam. maj. 83, min. 63 mill, umbilicus 6 mill. 



Tena and Archidona, Ecuador. 



The last locality is that of a magnificent specimen in the 

 collection of Mr. John Ford of Philadelphia. This is the largest 

 and handsomest species of Solaropsis. 



The following is probably a color-variety of H. gibboni. 



Var. COUSINI Jousseaume. Unfigured. 



Large, umbilicate, rather solid, depressed, sublenticular, regularly 

 striate ; first 2 whorls flat, uniform yellowish ; following whorls 

 painted with spiral bands of red and white flames. This form is 

 the same size as H. amori; the spire is less depressed ; whorls less 

 depressed ; aperture larger; coloration above consists of pretty wide, 



