VI VI PAR A. 87 



Tar. tezpurensis (Nevill), Cat. Moll., Ease. E, p. 35. 



"A very interesting form, almost exactly intermediate between 

 P. crassa and P. siamensis. Spire much shorter than in typical 

 form, and only a little more produced than in the Siam species ; 

 whorls more globose ; aperture less deflected, umbilicus less open, 

 sculpture more distinctly malleated " 



Alt. 17*5, diam. 15'5 mm. 



Aperture: alt. 9'5, diam. 11-5 mm. 



Hob. Tezpur. 



173. Vivipara siamensis (Frauenfeld) . 



Vivipara siamensis (Frauenfeld), Verh.zool.-bot. Ges. Wien, 1865, 

 p. 531, pi. 2-2 ; Nevill, J. A. S. B. xlvi, pt. 2, p. 32, & op. cit. 1, 

 p. 32. 



Shell solid, acuminately conic, flattened below, widely per- 

 forate, somewhat polished, very pale olive-green, margins of the 

 upper whorls almost whitish, the third and fourth convolutions 

 tinged with purplish-brown ; whorls 5, very convex, though 

 somewhat flattened in the sutural region, marked wirh faint 

 growth lines which show darkly here and t^ere and sculptured 

 with weak, interrupted, spiral striae ; aperture large, broad ; 

 labrum thick, black ; interior of shell white ; operculum thin, 

 pale brownish, with very excentric nucleus. 



Alt. 24, diam. 21 mm'. 



Aperture : alt. (including the labrum) 17'5, diam. 14'5 mm. 



Hob. Siam. 



Var. burmanica (Nevill), Hand List, pt. 2, p. 26. 



Original description : A very small variety ; spire short, apex 

 obtuse, with the whorls even less acute and exserted, the last one 

 larger in proportion and more globosely swollen, with the keel 

 round the umbilicus obsolete ; aperture more contracted, that is, 

 less dilately expanded : colouration of epidermis and the black 

 peristome exactly similar. 



Alt. 11, diam. 10 mm. 



Hob. Prome, on the Irawady (type) (TJieobald)- Tenasserim 

 Province (Limborg) ; Yaylaymaw, Upper Burma (Anderson). 



174. Vivipara dissimilis (Muller}. 



Vivipara dissimilis (Muller), Verm. pt. 2, p. 184 (as Nertta.)', 

 Schroter, Einl^it. Conch, ii, p. 253, pi. 4, tig. 10 (Nerita). 



Helix dissimilis, Gmelin, Syst.. Nat. 3647 ; Dillwyn, Desc. Cat. 

 p. 941 (Nerita). 



Paludina remossii, Kiister (not Philippi), ed. Chemn., Paludina, 

 p. 26, pi. 5, figs. 17, 18 ; H. & T., C. 1. pi. 77, figs. 3, 4. 



Original description : Testa pellucida glabra f uscescente-alba ; 

 albido maxime m iui'eriore anfractus parte conspicitur, quasi 



