PALUDOMUS. 55 



tudiualiter subobscure sulcato-striata, spira bi*evi ; anfractibus 

 convexis superne subdepressis, et minute spiraliter sulcatis, 

 olivaceo-t'usca, nigrieante obscure bifasciata ; apertura albida. 



The (limensioiis according to the figure iu the ' Conchologia 

 Indica ' are as follows : — 



Alt. 17'o, diam. 14 mm. 



Hah. Mountain streams of Ceylon. 



"Allied to F. decussata, but of more acuniiiiated growth." 



]o;5. Paludomus (Philopotamis) rupaeformis [llrot). 



Pahidoinus (Philopotamis) rup(pfonni>i (I^rot). Concb.-Cab. ii, 

 p. 30, 1880, pi. 5, tig. 10 ; Nevill, Hand List, pt. 2, p. 298. 



Oriyimd description : — Testa globoso-mucronata, solidula, corueo- 

 olivacea, nigro inquinata, unicolor. Spira subintegra, parvula, 

 breviter concavo-mucroiiata ; anfr. 6 (Integra) ad 1 ) convexi, 

 sutura distinc-ta divisi, laevigati, leute cresoentes ; ultimus subito 

 inllatus, globosus, sublcevigatus vel striis incrementi tenuibus vix 

 striatulus. Apertura ovata, superne acuminata, basi rotundata, 

 intus alba, vel pallide late bifasciata ; columella arcuata, crassi- 

 uscula. Operculum typicum. 



Alt. 16, diam. 12 mm. 



Aperture : alt. 10-5, dium. mm. 



Hah. Matale, Ceylon (Lai/ard). 



104. Paludomus (Philopotamis) regalis, Luyard. 



Fcdndomus {FJiilopotcDiiis) rcf/tnis. Ljivaid, P. Z. S. 1854. p. 93 ; 

 II. & T., C. 1. pi. 121, tig. lb. 



Orhjinal description : — Shell oblong ovate ; axis 1 inch, diam. 

 9 lines. Spire exserted, short. AVhorls rounded, depressed at 

 the upper part, spirally corded witli close-set slight ridges, longi- 

 tudinally minutely striated, and crowned with a single row of 

 short, sharp, hollow, angular spines, closely set. Colour yellowish- 

 olive, painted with wavy, dark bro^n longitudinal lines. Aperture 

 pure white. 



Operculum unknown, but most probably as in P. sulcata. 



Bah. Stream in the Cnia Corle, A\^estern Province, Ceylon. 



105. Paludomus (Philopotamis) nigricans (lieeve). 



Paludomux {Philopotamis) nigricans (lieeve). Cou. Icon.. Palud. 

 sp. 6 ; II. & T., C. I. pi. 124, ivr. 1. 



Original description: — Shell ovate, spire rather prominent, ex- 

 serted ; Avhorls smooth, faintly angled towards the base ; blackish, 

 interior bluish white. 



Alt. 13'75, diam. i)"25 mm. (taken from tig. in Conch. Icon.). 



JIab. Ceylon (in mountain streams at 6,000 feet elevation). 



