HELIX-SOLAROPSIS. 191 



H. NUBECULATA Deshayes. PI. 54, figs. 30, 31, 32. 



Discoidal, pretty thick, convex above and beneath ; spire very 

 obtuse, perceptibly convex, formed of 5 rounded whorls ; suture 

 simple, pretty deep ; whorls gradually increasing, shell smooth or 

 with light irregular lines of growth ; base convex, perforated by a 

 moderate umbilicus. Aperture large, wider than high, semilunar, 

 a little oblique ; peristome thin, a little expanded above, obtuse be- 

 low, columella sinuous. Color grayish or yellowish, longitudinally 

 clouded with undulating streaks, shading at their edges into the 

 ground-color ; base without markings. 



Alt. 11-12, diam. 19 mill. 



H. nubeculata DESHAYES, Mag. de Zool. 1831, t. 28; in Per., 

 Hist., vol. i, p. 66, t. 691, f. 1-4. PFEIFFER, Monog. Hel. Viv., i, 

 p. 387. 



A species which has not been recognized with certainty in recent 

 times. The above description is from that of Deshayes. 



H. CATENIFERA Pfeiffer. PL 52, figs. 99, 100, 101. 



Umbilicate, depressed, thin, closely granulate, diaphanous, pale 

 brown, ornamented with interrupted, varied, chain-like bands ; spire 

 subplane ; whorls 5, a little convex, the last ventricose, scarcely 

 descending anteriorly ; base convex ; umbilicus funnel-shaped ; aper- 

 ture subvertical, lunate rounded ; peristome thin, the margins con- 

 verging, superior and basal margins hardly expanded, the columellar 

 a little dilated. (Pfr.) 



Alt. 12, diam. maj. 25*, min. 21 mill. 



Andes of New Grenada. 



H. catenifera PFR., in Proc. Zool. Soc.. Lond. 1852, p. 152 ; in 

 Kiister's Conchyl. Cab., p. 367, t. 139, f. 6-8 ; Monog. Hel. Viv., iii, 

 p. 248. REEVE, Conch. Icon., f. 570. 



H. MABMATENSIS Pfeiffer. PL 58, figs. 43-45. 



Umbilicate, small, fragile, depressed, light corneous, whitish 

 beneath, with five girdles of chestnut-brown spots, squarish in shape, 

 and with a slight tendency to form oblique streaks ; four rows of 

 spots above, one below the periphery ; the first two often sub- 

 coalescent ; surface dull, lusterless, under a lens seen to be minutely 

 granulate, and covered with very short hairs; spire nearly flat; 

 suture deeply impressed; whorls 4 to 4?, quite convex, the last 

 rounded and convex, scarcely descending in front ; aperture rounded- 



