184 HELIX-SOLAROPSIS. 



sinuous, oblique brownish-chestnut flammules, separated by whitish- 

 yellow spaces ; base 2-banded. 



Alt. 45, diam. maj. 85, min. 70 mill. 



Napo Basin, Ecuador. 



Solaropsis cousini Jouss., Bull. Soc. Zool. France, xiii, p. 177, 

 1887. COUSIN, Faune Mai. Rep. Equateur, p. 67 (Bull. Soc. Zool. 

 France, xiii, 1887). 



H. PILESTANS PFEIFFER. PL 53, fig. 16. 



Nearly covered perforate, globose depressed, rather thin, striatulate, 

 chestnut-colored above, ornamented with buff flammules, base buff, 

 irregularly banded with chestnut, covered with a slightly shining 

 epidermis; spire short, obtuse; whorls 4, slightly convex, the last 

 inflated, scarcely descending anteriorly ; aperture oblique, rounded- 

 lunar, pearly within ; peristome livid, briefly expanded and re- 

 flexed, the margins scarcely converging, joined by a callous, the 

 columellar dilated. (P/V.) 



Alt. 26, diam. maj. 53, in in 42 mill. 



Province of Ocana, New Grenada. 



H. prazstans PFR., Proc. Zool. Soc. Lond. 1853, p. 126 ; Monog. 

 Hel. Viv., iv, p. 212. REEVE, Conch. Icon., f. 1276. DOHRN, 

 Jahrbiicher d. Mai. Gesell., ii, p. 298. 



H. BRiziLiANA Deshayes. PL 53, figs. 14, 15. 



Umbilicate, depressed, thin but rather solid, chestnut-colored 

 above, with a subsutural and a supra-peripheral baud of alternating 

 dark chestnut and whitish angular spots; below the periphery 

 light yellowish-chestnut with numerous spiral articulated lines and 

 narrow bands; surface densely very regularly granulate all over 

 (except the apical whorls), the granules equidistant, arranged (more 

 or less obviously) into oblique rows. The spire is depressed, only a 

 trifle convex; apex obtuse; sutures impressed; whorls about 5, 

 regularly widening, slightly convex, the last depressed, obsoletely 

 angular at the periphery, which is decidedly above the middle of the 

 whorl; base very convex. Aperture oblong-lunar, slightly oblique, 

 delicate lilac-colored inside ; peristome all around narrowly ex- 

 panded and subreflexed, white, its upper, outer and columellar 



