Zoological Society. 1 17 



Melania cochlea. M. testd subspinosd, turritd, cosiatd, striata, 

 tenui.fulvd, maculis badiis ; spird scalariformi, ovato-acuminatd, 

 apice acuta; suturd lineari ; anfractibus decern, in/erne subcoti- 

 vexis, superne angulalis et concavis ; cost is obliquis, longitudina- 

 libus, anfractuum in angulo elevatis et acute mucronatis, superne 

 vix obsoletis ; striis transversis, minutis, aliquando obsoletis ; an- 

 fractu ultimo parvo, ad basim striato ; aperturd ovatd, superne 

 acutd, in/erne effusd. 



Hah. ? 



Length 1, diam. "4 of an inch. 



Remark. — On the last whorl of the only specimen submitted, the 

 costse are almost obsolete. The striae are strongest near the sutures, 

 and scarcely visible at the middle of the whorls. 



Melania lateritia. M. testd cancellatd, acute ovatd, compressd, 

 crassiusculd, striatd, graniferd, albidd, virido-fuscd, rufo fasciatd 

 aut atrd ; spird elevatd, plerumque scalariformi, apicj acutd aut 

 erosd ; suturd impressd, crenatd ; anfractibus decern, planatis, 

 superne angulatis, supra angulum s&pe albidis ; striis transversis 

 crebris graniferis ; granulis quadratis, abrvptis, planatis, serie- 

 bus longitudinalibus positis ; anfractu ultimo magno, subcom- 

 presso ; basi graniferd ; aperturd ovatd, superne acute angulatd 

 et sinuatd, in/erne latd, expansd et retusd, interne soepe fasciatd ; 

 columelld contortd ; operculo parvo, ovato. 

 Hab. Philippines. 

 Length 1*6, diam. •/ of an inch. 



Var. a. Anfractibus superne graniferis, inferne striis transversis 

 impressis ; basi vix Icevi, striis raris. 

 Var. /3. Striis graniferis alternantibus. 



Remarks. — A very variable species as to size, colour and sculp- 

 ture. The operculum differs much in some individuals in both its 

 shape and apex. This shell bears some resemblance to the M. gra- 

 nifera, Lam. Its most remarkable characteristic is its square, flat- 

 tened granules, bearing some resemblance to brickwork. 



Melania modicella. M. testd larvi, ovato-conicd, crassd, nitidd, 

 virido-fuscd ; spird conicd, brevi, apice acutd, sxpe erosd ; suturd 

 lineari ; anfractibus quinque, convexis, rapidt crescentibus, prope 

 suturam superiorem depressis, prope suturam inferiorem striis 

 parvis transversis duabus aut tribus ; anfractu ultimo magno, 

 medio striis tribus, basi Levi} aperturd ovato-rotundd, superne 

 subangulatd, inferne subeffusd, intus albidd ; labro acuto ; colu- 

 melld lacted, curvatd ; operculo ovato, subcentrali, concentrico. 

 Hab. Timor. 



Length v, diam. *5 of an inch. 



Remarks. — This shell and the M. zeylanira may perhaps be taken 

 as the types of a new genus or subgenus. Further investigation with 

 respect to the animal may decide ; in the meantime, the name of 

 Rivulina is proposed provisionally. The general outline and oper- 

 culum are those of the Paludina. In old specimens the peritreme of 

 . the mouth is continuous, but there is onlv a slight depression behind 



10* 



