172 HELIX-LABYRINTHUS. 



basal margin subangularly produced downward in the middle, the 

 left part with a strong oblique tooth, the right part with two erect 

 subparallel distant teeth, joined at the base. (Pfeiffer.) 



Alt. 18, diam. maj. 46, min. 39 mill. (Pfeifer.) 



Alt. 15, diam. maj. 44, min. 38 mill. (Hupe.) 



Huancavelica and Meobamba, Peru. 



H.furcillata HUPE, Kevue et Mag. de Zool. 1853, p. 302, t. 11, f. 

 2. PFEIFFER in Novit. Conch., i, p. 58, 1. 17, f. 3, 4 (" H. erecta " on 

 plate) ; Monographia, iv, p. 304. Hupe, in Castelnau, Exped. 

 Amer. Sud, moll., p. 18, t. 3, f. 1. 



Differs from H. bifurcata Desh. by the more separated, less diverg- 

 ing branches of the bifid outer basal tooth. H. raimondii Phil, is 

 more acutely carinated at the periphery. Figure 91 is very incorrect 

 in not showing the outer branch of the outer basal tooth ; fig. 92 

 is correct. 



H. RAIMONDII Philippi. PI. 40, figs. 91-95. 



Umbilicate, lenticular, acutely carinated, thin but rather solid, 

 chestnut-colored, the peripheral region yellowish ; surface lightly 

 obliquely striate, under a lens finely granulate ; spire low, convex, 

 apex obtuse, apical whorl light colored ; sutures scarcely impressed ; 

 whorls 5 to 6, nearly flat, slowly widening, the last deflexed ante- 

 riorly, constricted behind the lip on the base; aperture nearly 

 horizontal, subrhomboidal, light brown inside ; peristome expanded, 

 brown, basal margin reflexed, terminations continued across the 

 parietal wall in a straight elevated plate of callous ; basal margin 

 subangular in the middle, bearing a wide outer tooth, with two 

 diverging branches, its position marked behind the lip by a long, 

 deep groove ; toward the columellar base there is a narrow, com- 

 pressed blunt fold ; the parietal wall bears an erect, obliquely enter- 

 ing nearly straight lamina, not connected with the parietal peristome- 

 connecting callous ; umbilicus deep, wide, rather funnel-shaped. 



Alt. 19, diam. maj. 51, min. 45, of umbilicus 8 mill. 



Alt. 14, diam. maj. 38, min. 33, of umbilicus 5? mill. 



Peru and Ecuador. 



H. raimondii PHIL., Malak. Blatter 1867, p. 65. PFEIFFER, in 

 Novitates Conchol., iii, t. 79, f. 7-9 ; Monographia Hel. Viv., v, p. 

 411. HIDALGO, Viage al Pacifico, Mol., p. 17, t. 2, f. 4, b.H. 

 tarapotonensis var. f HIDALGO, Journ. de Conchyl., 1870, p. 38. 



