BITHYN1A. 75 



Var. parvula. 



Hab. Moradabad ; Jaunpur. 



Var. acuminata. 



Hab. Andainaris? (Roepstorff). 



149. Bithynia nassa, Theobald. 



Bithynia nassa, Theobald, J. A. S. B. xxxiv, pt. 2, 1865, p. 27o ; 

 op. cit, xxxix, pt. 2, p. 404, pi. 18, %. 8; H. & T., 0. I. pi. 37, 

 figs. 8, 9. 



Original description : Testa elongata, i urbinata, polita, diaphana, 

 solidiuscula. Labio expansiusculo, plica callosa externa munita. 

 Anfractibus quinque. 



Alt. 10-25, diam. 6-25 mm. 



Hab. Shan States. 



A supplementary and fuller description is given in the Journ. 

 Asiat. Soc. Bengal, vol. xxxix, as follows : 



Testa elongate turrita, polita, diaphana, solidiuscula, imper- 

 forata; anfractibus 6, lente convexis, sutura simplici junctis, 

 striis exilissimis increment! tectis ; ultimo basi convexiusculo ; 

 spira breviore ; apertura subovata, intus Isevi, supra (vel postice) 

 acute angulata, antice rotundata, sensim producfa ; labio et labro 

 leviter curvatis, primo paulo incrassato, altero acuto, margine 

 tenui, extra prope marginem costa solidiuscula crassa instructo ; 

 operculo testaceo, ovato, concentrice striato, nucleo subcentralL 



Alt. 8-5, diam. maj. 6-25 mm. 



Aperture : alt. 4-75, diam. 3-25 mm. 



Hab. Shan States. 



150. Bithynia laevis, Morelet. 



Bithynia leevis, Morelet, Ser. Conch, iv, 1875, p. 313, pi. 13, fig-. 2 

 (as Bithinia Itevis) ; Nevill, Hand List, pt. 2, p. 38. 



Original description : Testa superficialiter arcuato-rimata, 

 conico-oblonga, corneo-rubella vel lutescens, lineolis spadiceis, 

 distantibus, longitudinal iter uotata, uitida, Isevis, apice trunca- 

 tula; anfr. 5| convexiusculi, sutura simplici juncti, ultimus 

 ventriculosus, circa rimam compressus : apertura ovalis, basi 

 angulata, intus albido-toarulea, marginibus crassioribus, obtusiu>- 

 culis, fusco anguste limbatis, columellari strictim dilatato. 

 Operculum testaceum, pagina interna homogenea, alba, externa 

 concaviuscula, epidermide fulva, concentrice striata iuduta, nucleo 

 subcentrali. 



Alt. 10, diam. 5 mm. 



Aperture: alt. 4-5 mm. 



Hab. Siam, Cochin China (Morelet) ; Damothu, Moulmcin 

 (Stolwzlca $ Riclithofen). 



