EULOTA. 199 



thin, the surface smoothish, generally with minute spiral striae ; 

 colour varying from sub-translucent white to light brown or 

 yellowish, often with a supra-peripheral band (rarely several 

 bands). Whorls 5-6, convex, the last hardly descending in 

 front. Aperture round-lunate, toothless ; peristome thickened 

 within and expanded, dilated at coluinellar insertion. 



"Jaw arched, with 4-11 ribs denticulating the concave margin. 



" E/adula of E. fruticum having the median cusp of middle 

 teeth as long as basal plate, side cusps subobsolete. Laterals 

 with longer rnesocones. Marginals with long bifid inner and 

 011 the outer ones bifid outer cusps. 



" Genitalia : penis short, swollen, passing into a long epi- 

 phallus which receives vas deferens and retractor, but lacks 

 flagellum. Dart sack globose, containing a round, conical dart, 

 and communicating at base with an empty accessory sack which 

 bears the mucus glands ; these consist of 2-4 oval glands, closely 

 bound together, and flattened on their adjacent sides, their ducts 

 uniting into one canal which opens into the accessory sack. 

 Duct of sperm atheca long, inserted high on vagina. 



" Eulota is here used for a considerable number of oriental 

 snails having essentially the organisation of the European 

 E. fruticum. The penis lacks flagellum ; the dart sack generally 

 bears an accessory empty sack into which the many- or few- 

 lobed mucus gland empties ; and the dart is round in section 

 or but little flattened, the shell being globose with conoidal, 

 though low, spire.'*' (Pilsbry.) 



171. Eulota bolus, Benson. 



Helix bolus, Benson, A.M.N.H. (2) xviii, 1856, p. 252; Theobald, 

 J. A. S. B. xxvi, 1857, p. 242 ; Blanford, op. cit. xxxiv, 1865, 

 p. 89 ; Hanley & Theobald, Conch. Ind. 1870, pi. 53, fig. 7. 



Helix (Dorcasia) bolus, von Martens, Die Heliceen, ed. 2, 1860, 

 p. 107 ; Nevill, J. A. S. B. xlvi, 1877, p. 22 ; ibid, in Anderson, 

 Zool. Res. Two Exped. West. Yunnan, i, 1878, p. 881 ; Tapparone 

 Canefri, Ann. Mus. Civ. Geneva, ser. 2, vii, 1889, p. 327 ; Try on, 

 Man. Conch, ser. 2, iii, 1887, pi. 48, fig. 77. 



Helix (Planispira) bolus, Nevill, Hand List, i, 1878, p. 80. 



Original description : " Testa anguste umbilicata, globosa, 

 tennis, oblique striatula, stnis minutissimis confertissimis spira- 

 libus sub lente sculpta, nitidula, translucens, pallide cornea, inter- 

 du3i fascia unica rufa supra peripheriam ornata ; spira conoidea, 

 apice obtusiuscula ; sutura leviter impressa ; anfr. 5 convexiusculi, 

 ultimus non descendens, inflatus ; apertura vix obliqua, rotundato- 

 lunaris ; peristomate tenue, expansiusculum, albidum, margine 

 colurnellari latiore, superne umbilicum semitegente. 



"Diam. maj. 14-15|, min. 12-14, alt. 10i-llJ mill. Apert. 

 majoris 9 mill, longa, 8 lata." (Benson.) 



Hab. Burma: Prome (Theobald, Fea\ Thyet Myo (StoliczJca\ 

 Pagan (Anderson). China : Ponsee and Sanda, Yunnan (Anderson). 



