HELIX. 83 



certain of the coloring, but no trace of a brown band is visible. It 

 is probably a distinct species. 



H. PHONICA Mabille. Vol. VI, pi. 15, figs. 74, 75. 



Nearly covered perforate, trochiform, thin but solid, corneous, 

 subpellucid, shining, subarcuately and irregularly striated; spire 

 high-pyramidal, the apex rather obtuse, concolored. Whorls 8, a 

 little convex, regularly increasing separated by impressed sutures ; 

 last whorl larger, acutely carinated, sloping above, a little deflexed 

 and dilated at the aperture. Aperture transversely ovate, lunate, 

 angled at the outer lower margin; peristome scarcely thickened, 

 acute, a little reflexed ; outer margin a little curved, slightly in- 

 flexed ; basal margin curved, shortly reflexed ; columellar margin 

 dilated in a white triangular plate, nearly covering the umbilicus. 



Alt. 12, greater diam. 11, lesser 10 mill. (Mabille.) 



Tonquin. 



H. phonica J. MABILLE, Moll. Tonk., diagn., p. 3, May 14, 1887 ; 

 Bull. Soc. Mai. Fr. iv, p. 94, t. 2, f. 8, 9, 1887. 



Evidently allied to H. perakensis, but larger, more acutely keeled, 

 and with narrower umbilicus. 



H. ROSTRELLA Pfeiffer. PI. 18, figs. 48, 49, 50. 



Shell umbilicate, globose-trochiform, rather thin, irregularly striat- 

 ulate, silky, tawny-corneous. Spire conoid, apex rather acute; 

 whorls 5 J, a little convex, the last slightly descending in front, car- 

 inated above the middle, the base more convex. Umbilicus nar- 

 row. Aperture oblique, submargaritaceous inside ; peristome white 

 or flesh colored the margins converging, right margin expanded, 

 subsinuate above the carina, then shortly beaked, the basal margin a 

 little reflexed and at the insertion subdilated. 



Alt. 10, greater diam. 17, lesser 15 mill. (P/r.) 



Laos Mts., Cambodia. 



H. rostrella PFR., P. Z. S. 1862. p. 270 ; Monogr. v, p. 331 ; Novit. 

 Conch, iii, p. 379, t. 88, f. 1-3. 



Var. Corneous-white, with a chestnut band at the carina. 



Probably a Satsuma. 



H. SCENOMA Benson. PL 18, figs. 53, 54. 



Shell with a narrow funnel-shaped umbilicus, subglobose-conoid, 

 obliquely, irregularly striated, decussated by very minute spiral 

 striae, whitish under a corneous epidermis, sometimes having a red- 



