168 GANESELLA. 



believe, with Schacko, that it is a modified branch of the Helix 

 stock. It is probably arboreal in habit. Only species, C. infan- 

 tiiis Gredl., ii, 216. Prov. Kwang-si and Hunan, China; Tonquin. 



Genus GANESELLA Blanford, 1863. 



Ganesella'Bi.A.yF. Ann. Mag. Nat. Hist. (3), xi, p. 86, type H. 

 capitium Bens. (Feb., 1863). Satsuma A. ADAMS, Ann. Mag. (4), 

 i, p. 463, type H.japonica, patruelis, peculiaris, (June, 1868). Fru- 

 ticotrochus KOBELT, Fauna Molluscorum extramarinorum Japonia?, 

 1879, p. 48, same types. Trochomorphoides NEVILL, Hand List 

 Moll. Ind. Mus. pt. 1, p. 80, type H. acris Bens. (1878). 



Shell more or less trochiform, umbilicated (or rarely imperfor- 

 ate), rather thin; light-colored, plain or with a peripheral line; 

 surface with growth-lines only or densely spirally striate; 

 whorls 41-6, the last a little descending in front. Aperture oval 

 or angular-lunate, oblique, toothless or with a blunt columellar fold ; 

 lip expanded, broadly dilated at columellar insertion. Type G. 

 capitium, pi. 55, fig. 18. See also pi. 64, fig. 7, G.japonica. 



Animal (of G.japonica) with the foot .very long and narroiv, sole 

 not distinctly tripartite ; upper surface finely and feebly granular, 

 back with a pair of dorsal grooves, no facial grooves; tail narrow, 

 long, with a median longitudinal groove above. 



Jaw arcuate, with about 9 ribs denticulating the lower margin 

 (pi. 60, fig. 1, G.japonica^. 



Radula of the type usual in ground snails. Middle tooth with 

 mesocone only developed, shorter than basal-plate, side-cusps repre- 

 sented by slight lateral extensions. Laterals similar but with the 

 cusp longer. Marginals with oblique, bifid inner cusp and an ecto- 

 cone (pi. 60, fig. 2, G.japonica). 



Genital system (Frontispiece, figs. 1, 2, G. japonica} having the 

 penis long and twisted, ending in a curved blind sack with corru- 

 gated inner walls (fig. 2, apex of penis and sack opened) ; epi- 

 phallus long, bearing the retractor, terminating in a flagellum and 

 the vas deferens. Vagina extremely long, the spermatheca duct 

 inserted high. Spermatheca oblong, on a stout duct, neither duct 

 nor bulb being bound to uterus. No dart sack or mucus glands. 



Distribution, Japan and China to India, southeast to Sumatra 

 Borneo and Philippine Is. 



This genus has the genital system, jaw and radula, as well as the 

 tail-groove of Ohloritis (see PI. 28, figs. 1 to 9), but.the penis-papilla 



