194 HEL1CID.E. 



Range. India and Farther India to China and Japan, Malay 

 Archipelago and Philippine Islands. 



" Shell more or less trochiform, umbilicated (or rarely imper- 

 forate), rather thin ; light coloured, plain or with a peripheral 

 line ; surface with growth-lines only or densely spirally striate ; 

 whorls 4| to 6, the last a little descending iu front. Aperture 

 oval or angular-lunate, oblique, toothless or with a blunt columellar 

 fold ; lip expanded, broadly dilated at columellar insertion. 



" Animal (of G. japonica) with the foot very long and narrow, 

 sole not distinctly tripartite ; upper surface finely and feebly 

 granular, back with a pair of dorsal grooves, no facial grooves ; 

 tail narrow, long, witli a median longitudinal groove above. 



" Jaw arcuate, with about 9 ribs denticulating the lower margin. 



" Eadula of the type usual in ground snails. Middle tooth with 

 mesocone ouly developed, shorter than basal plate, side-cusps 

 represented by slight lateral extensions. Laterals similar but with 

 the cusp longer. Marginals with oblique, bifid inner cusp and an 

 ectocone. 



" Genital system having the penis long and twisted, ending in a 

 curved blind sack with corrugated inner walls ; epiphallus long, 

 bearing the retractor, terminating in a flagellurn 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." 

 (Pilslry.) 



167. Ganesella acris, Benson. 



Helix acris, Benson, A. M. N. H. ser. 3, iii, 1859, p. 367 ; Ilanley 



& Theobald, Conch. Ind. 1870, pi. 54, fig. 6. 

 Helix (Trochomoi-phoides) acris, God win- Austen, J. A. S. B. xlv, 



1876, p. 312 ; Nevill, Hand List, i, 1878, p. 80. 

 Helix (Patula (Trochomorpha)) acris, Try on, Man. Conch, ser. 2, iii, 



1887, p. 74, pi. 14, fig. 1. 



Ganesella acris, Pilsbry, Man. Conch, ser. 2, ix, 1894, p. 170. 

 Helix piiellula (Benson, MS.), Theobald, J. A. S. B. xxiii, 1858, 



p. 319 (nom. nud.). 



Original description : " Testa anguste umbilicata, elevato- 

 conica, trochiformi, oblique striatula, obsolete granulosa, subtus 

 minutissime spiraliter striata, albida; spira elougato-conica, 

 lateribus planis, apice obtusiusculo, sutura leviter impressa ; 

 anfractibus 6| planulatis, ultimo vix descendente, ad peripheriam 

 acute carinato, basi planiusculo ; apertura valde obliqua, tetragono- 

 lunata, peristomate superne expansiusculo, subtus expanse, 

 reflexiusculo, margine columellari late angulato-reflexo, umbilicutn 

 partim celante. 



" Diain. maj. 10, min. 9, axis 9 mill." (Benson.) 

 Hal. India: Khasi Hills, Teria Ghat (Theobald, Godwin- 

 Austen) ; Naga Hills (Roberts) ; Dana Hills (Godwin- Austen). 



