HELIX-SOLAROPSIS. 185 



margins all decidedly very regularly arcuate, the basal margin 

 regularly curved. 



Alt. 19, diam. maj. 42, min. 34. mill. ; umbil. 3 mill. 



Alt. IS, diam. maj. 39, min. 33 mill.; umbil. 2t> mill. 



Alt. 17, diam. maj. 33, min. 27 mill. 



Brazil. 



H. braziliana DESH. Encyc. Meth., ii, p. 211. PFEIFFER, in 

 Conchyl. Cab., p. 211, t. 107, f. 1-3; Mon. Hel. Viv., i, p. 372. 

 REEVE, Conch. Icon., f. 536. HIDALGO, Viage al Pacifico, Moll., p. 

 9. HLTPE in Castelnau, Exped. dans FAmer. du Sud., Moll., p. 8, 

 t. 2, f. 2. If. pellis-serpentis var. FEB., Histoire, t. 75 B, f. 6-8. 

 H. serpens ORB., Voy. dans 1'Amer. Merid., p. 244. 



I have never seen a specimen with hirsute cuticle as it is figured 

 by Ferussac. The numerous specimens before me show but slight 

 variation except in size. The spiral bands of chestnut-colored spots 

 are more numerous than in other species, especially on the base. 



H. HELIACA d'Orbigny. PL 53, figs. 4, 5, 6, 7. 



Orbicular, depressed, umbilicate, subcarinate, thin, translucent, 

 fragile; the surface above is shagreened at the summit, but the two 

 last whorls of the spire are sculptured by elevated oblique, inter- 

 rupted and zigzag ridges, which cover most of the surface ; the tract 

 around the umbilicus is entirely smooth. The spire is obviously 

 elevated, composed of 6 whorls, a little carinated ; umbilicus narrow, 

 partly concealed by the lip ; aperture very oblique, broader than 

 high ; peristome wide, broadly reflexed, sinuous at the columella. 

 Color yellowish fawn ornamented with 3 spiral series of spots above, 

 2 below ; two of the bands above are composed of transverse 

 elongated interrupted fawn-colored blotches ; the third is median and 

 linear ; beneath, the outer band is composed of broad transverse 

 spots, which unite with a second one, composed of elongated 

 interrupted spots. Peristome white. ( Orb.) 



Alt. 16, diam. 37 mill. ; alt. 12, diam. 28 mill. 



Bolivia and Argentine Republic. 



H. heliaca ORB. Voy. dans 1'Amer. Merid. Moll., p. 244, t. 26, f. 

 1-5. PFR. in Conchyl. Cab., p. 211, t. 107, f. 4-6; Monographia 

 Hel. Viv., i, p. 372. REEVE, Conch. Icon., f. 538. HUPE, Casteln. 

 Exped. dans 1'Amer. du Sud. Moll., p. 10, t. 2, f. 1. H. cicatricom 

 ANTON, Verzeich., p. 38 (teste Pfr.). 



