HELIX. 127 



cicatrix 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. PI. 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. PI. 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. REYREI, Souverbie. PI. 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. 



Gruayaquil. 

 *** 

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



Very widely umbilicated, plane above, widely excavated below, 

 light yellowish brown ; whorls 1011, 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. PI. 26, figs. 16-18. 



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

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

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



Ins. Vavao. 



