rii.A. 103 



204. Pila alacinans (Sowerbi/). 



Pill aliicinans (Sowerby), Pruc. Malac. Sue. ix, p. 6-'J (li^. iu text) 

 (as Ampullaria) . 



Original description : — Testa late turbinata, inedioeriter uinbili- 

 cata, fu.sco-olivacea, fast-iis numerosis angustis iiigio-fuscis ornata, 

 loiigitiidiiialiter irregiilanter plic-ata et striata, striis transversis 

 siibtilissiiiiis decussata ; s]iira brevis ; anfractus convexi, supra 

 plainilati; ultimus latiusculiis, superne rotuiule angulatus, supra 

 angukiin levit.Hr depressus, iutra aiigiiluiu rotunde coiivexus, 

 basim versus leviter coutraetus ; apertiira latiuscula, ini\x-i ta^ciata ; 

 peristoma teiiue. 



Alt. "I'S^ diaiii. 2.'} mm. 



Aperture: alt. 22, diam. 12 mm. 



Uab. Ceylou. 



205. Pila wiakleyi {Pihbry). 



Pila winklei/i (Pilsbry), Proc. Acad. Nat. Sci., Pliiladolphia, liii, 

 1901, p. 1*9, pi. 5, ligs. 2, 3 (as AinpuUariu). 



Original description : — Shell narrowly umbilicate, globose ; 

 yellowisb-olive, uniform or with few or numerous dusky olive 

 spiral bands, the earlier whorls eroded, blackish or ruddy. Surface 

 smooth, somewhat shining, under a strong lens seen to be very 

 densely, microscopically st riated spirally, the striie minutely gianu- 

 lose ; s|)ire low-conic ; sutures impressed, the whorls flattened 

 below them, elsewhere symmetrically convex. Aperture vertical, 

 semi-rotund, narrower above, reddish-tawny and sometimes banded 

 within, becoming white near the lip; peristome a trifle expanded 

 below, white or dirty yellowish, the outer margin equably curved, 

 columella concave, blunt and more or less thickened but not 

 reflexed, parietal callus rather thin, white, thinner within. Oper- 

 culum thick and solid, concave externally, and partially covered 

 with a thin, yellowish-brown cuticle. Inside blnish, with a mica- 

 like gleam, the scar of attachment sunken, the columellar side 

 concentrically striate, the enclosed eminence narrow, curved and 

 smooth. 



Alt. 58, diam. 50 mm. 



Apertnre : alt. maj. 43 mm. 



Uab. Ilenzada, Burma ( Winkleif). 



Types iu Coll. Acad. Xat. Sciences, Philadelphia. 



