184 HELIX. 



whorls 4J, a little convex, the last tumid, constricted at the aper- 

 ture ; peristome thin, expanded, subreflected, white within, half 

 covering the umbilicus. Diam. 17 mill. 



Clarence and Richmond Rivers, Australia. 



H. MUTICA, Morelet. PI. 40, figs. 29-31. 



Narrowly umbilicated, thin, brownish, scarcely striate ; whorls 

 nearly 5, slightly convex, the last narrow, suture deep ; peristome 



thin, acute, extremities distant. Diam. 6 mill. 



Ins. Mayotte. 



H. RADIOLATA, Morelet. PL 40, figs. 33, 34. 



Narrowly umbilicated, thin, lightly costulate-striate, a little 

 shining, fulvous horny ; whorls 4i, narrow, with subchanneled 

 suture, the last whorl rounded ; peristome acute, simple, extremities 



connected by a thin parietal callus. Diani. 3 mill. 



Ins. Mayotte. 



H. SMIRUENSIS, Mousson. PL 40, figs. 44-46. 



Narrowly umbilicated, thin, diaphanous, very minutely, irreg- 

 ularly pilose ; light greyish ; whorls 4*, rather slowly increasing, 

 more convex below, periphery obtusely angulated ; peristome acute, 



margins remote. Diam. 6 mill. 



Java. 



jjAjj American Species. 



H. PUBESCENS, Pfr. PL 40, fig. 32. 



Very narrowly umbilicated, thin, smoothly, shortly pilose, diaph- 

 anous, yellowish ; whorls 5, a little convex, the last rounded, higher 

 than wide, not descending in front ; lip simple, the columellar 



margin shortly reflected above. Diam. 11 mill. 



Haiti. 



H. SUMICHRASTI, Crosse and Fischer. PL 40, figs. 37, 38. 



Widely umbilicated, rather thin, subtranslucent, with numerous 

 subdistant, longitudinal scales and short setse, suture deep ; whorls 

 4, slowly increasing, the last descending in front, with an obtuse 

 angle above, base a little flattened ; aperture brownish-white, peris- 

 tome reflected, margins converging, joined by a strong parietal cal- 

 lus. Diam. 16 mill. 



Huallaga, Mexico. 



Unfigured and doubtful species of Tricliia. 



H. VENDEANA, Letourn. Vendee, France. 



H. GOOSSENSI, Mabille. France. 



