HELIX. 



127 



eicatrix near the aperture; aperture obliquely subtriangular, lip 

 shortly reflected, the margins distant, subdepressed above, no inter- 

 nal teeth. Diam. 13-20 mill. 



jR. Maranon, Columbia ; Bolivia. 



H. SYSTROPHA, Albers. PL 26, figs. 22-24. 



Widely umbilicated, thin, striulate, scarcely shining, corneous ; 

 whorls 12, convex, very narrow, the last whorl a little wider, 

 scarcely descending in front, base inflated ; aperture diagonal, 

 lunar, the lip very shortly reflected. Diam. 13*5 mill. 



R. Maranon, Columbia. 



H. ORTONI, Crosse. PL 26, figs. 14, 15. 



Very widely umbilicated, smoothish, obsoletely obliquely striu- 

 late, light yellowish corneous, suture deep ; whorls 9, a little con- 

 vex, the last suddenly descending; aperture obliquely semioval, 

 subsinuous, lip white, slightly thickened, shortly reflected, slightly 

 scrobiculate without, unidentate within. Diam. 16 mill. 



Equador. 



H. KEYREI, Souverbie. PL 26, fig. 13. 



Widely umbilicated, yellowish corneous, closely obliquely costu- 

 late ; whorls 5, a little convex, periphery subangulate, the last 

 whorl gibbous in front ; aperture diagonal, reniform, deeply four- 

 tuberculated, lip shortly reflected, the margins joined by a trigonal 

 dentiform callus. Diam. 5*5 mill. 



Guayaquil. 



*** 

 H. MACGREGORI, Cox. PL 26, figs. 7, 8. 



Very widely umbilicated, plane above, widely excavated below, 

 light yellowish brown ; whorls 10-11, slowly increasing, roughly 

 striate, last whorl with carinate periphery, convex base, and a little 

 dilated and reflected anteriorly, suture margined ; aperture some- 

 what obliquely rounded-ovate, lip slightly thickened, not reflected. 

 Diam. 23 mill. 



New Ireland. 



H. MULTISPIRATA, Hombr. et Jacq. PL 26, figs. 16-18. 



Umbilicated, smooth, greyish corneous, spire plane ; whorls 6, 

 convex, narroAV, the last not descending, rounded ; aperture lunate, 

 with straight margin, basally a little thickened. Diam. 3'5 mill. 



Ins. Vavao. 



