HELIX-ISOMERIA. 153 



Conch. Icon., f. 547. HIDALGO, Viage al Pacifico, Mol., p. 13, 1. 1, 

 f. 6, 7 ; Journ. de Conchyl. 1870, p. 32. MILLER, Malak. Blatter. 

 1878, p. 171. 



H. XEOGRANADENSIS PfeifFer. PL 48, figs. 40, 41, 42. 



Imperforate, depressed, carinate, thin, minutely granulate all 

 over, deep brown ; spire scarcely elevated ; whorls 4J, nearly flat, 

 the last convex beneath, deflexed anteriorly, constricted ; aperture 

 very oblique, lunate-rounded ; peristome flesh-tinted, simple, ex- 

 panded, a little reflexed, its terminations joined by a thin callous; 

 basal margin very obsoletely uni-dentate, columellar margin short, 

 dilated, appressed. (Pfr.) 



Alt. 15, diam. maj. 34, min. 28 mill. 



Quindiu Mts., Colombia. 



H. neogranadensis PFEIFFER, Proc. Zool. Soc. Lond. 1845, p. 64 ; 

 Monograph! a, i, p. 296 ; Conchylien Cabinet, p. 435, t. 151, f. 13, 

 14. KEEVE, f. 548. DUNKER, in Jahrbucher d. deutschen Mai. 

 Gesellsch. 1882, p. 379, t. 11, f. 5, 6. 



A variety figured by Dunker (pi. 62, figs. 22, 23.) differs somewhat 

 from the type. It lacks a carina ; is pretty solid, and the whorls 

 are rugulose above. It is from the mountains of Ecuador. 



H. HARTWEGI Pfeiffer. PI. 45, figs. 15, 16. 



Umbilicate, depressed, carinate, solid, striatulate, brown ; spire 

 scarcely elevated ; whorls 5, planulate, the last a little more convex 

 on the base, not descending anteriorly ; umbilicus narrow, pervious; 

 aperture very oblique, irregularly subquadrate ; peristome white, 

 thickened, shortly reflexed, margins joined by a callous, right margin 

 sinuous, basal margin nearly straight, dilated, calloused inside, with 

 a single tooth. (Pfeiffer.') 



Loja, Ecuador. 



H. hartwegi PFR., in Proc. Zool. Soc. Lond. 1845, p. 126 ; Moii- 

 ographia, i, p. 403. REEVE, Conch. Icon., f. 575. MILLER, Malak. 

 Blatter 1878, p. 171. DOHRN, Jahrb. d. Mai. Gesell. 1880, p. 86. 

 Isomeria loxensis MILLER, Malak. Blatter 1879, p. 118, t. 12, 

 f. 1. 



Dohrn (loc. cit.) says : Isomeria loxensis Miller is equal to H. 

 hartwegi Pfr. Of these there lie before me 16 examples, of which 4 



