132 Zoological Society. 



conicd, apice erosd ; aperturd suhrotundd, iiilils albd et imll'ide 

 C£erulescente 3-4 fasciald ; labia conipresso, angusto, vulde de- 

 clivi, superne transversim calloso, marglne crenato el in medio 

 tenuiter arcualo ; lahro inferne dilalato, superne subfornicato. 

 Hab. " Isle of Negros, in a mountain-stream." H. Cuming. 



4. Nerita Leachii, lleciuz in Guerin, Rev. Cuvier. 1841, p. 312. 

 no. 33. 



Var. /3. Testd subglobosd, pallide fused, luteo-bifusciatd. 



Var. y. ? Testd subglobosd, nigerrimd, maculis punctiformibus vix 



triangularibus obsitd, nee fasciatd. 

 An var. Neritce guttata, Ptecluz in Rev. Cuv. 1841, p. 316. no. 40 ? 

 \''ar. 2. .'' Testd semiglobosd, tenuiore, striis longitudinalibus regu- 



laribus creberrimis, transversis, temiissimis, nigerrimd, maculis 



sparsis, raris, et fasciis angustis binis, lutescentibus, maculis par - 



vulis triangularibus palUdioribus confertis pietd. 

 Hab. " Isle of Bohol ; found in a small stream." H. Cuming. 



5. Nerita Sayaxa. Ner. testd veniricoso-ovatd, longitudinaliter 

 substriatd, temdusculd, nitiduld, nigratd, maculis fuscis seu lutes- 

 centibus, diversiformibus, variegutd aut fused et nigrescente nebu- 

 latd ; anfractibus duobus ; pi'imo partim deroso, infimo superne 

 depresso ; aperturd subrotundd, intus albd ; labia calloso, piano, 

 declivi, margine recto, in medio tenuissitne crenato. 



Hab. " Island of Guimaras, Philippines ; in small streams." H. 

 Cuming. 



6. Nerita (Cltthon) subpunctata. Ner. testd semiglobosd, oli- 

 vaceo-fuscd, tenuiter rugatd ; rugis punctis nigrescentibus seriatis 

 notatis, sub epidermide albd , nigro reticulatd ; anfractu unico, suprd 

 medium anguloso ; apice perforata ; aperturd extits subrotundd, in- 

 tits ulbo-cinerascente ; labio semilunari, piano, superne calloso, 

 margine in medio tenuiter arcuato et crenulato ; dente cardinali 

 majore, truncato. 



Hab. " Sinait, province of North Ilocos, isle of Luzon ; in a small 

 mountain-stream." H. Cuming, 



Sect. B. Labro intus scepAiis sulcata ; labio svperrie emarginata. 



7. Nerita Grayana. Ner. testd ovato-globosd, dorso oblique 

 conoided, transversim sulcata ; sulcis costis latioribus, striis longi- 

 tudinalibus creberrimis sculptd ; anfractibus sordide nigro-vio- 

 laceis, obsolete albo maculatis ; spird prominuld, conico-depressd, 

 acutd ; aperturd pallide fuscescente ; labia planulata, margine 

 tridentata, supra rugis confertis valde impresso ; labro intus regu- 



' lariter sulcata, superne unidentato. 



Hab. " Port Curimao, province of North Ilocos, isle of Luzon ; on 

 the rocks at low water." H. Cuming. 



8. Nerita Panayensis. Ner. testd parvd, ovato-conicd, aurantid, 

 tratisversim sulcatd, longitudinaliter crebi-e striatd ; costis subter 

 lente subgronasis ; spird conico-acutd ; labia piano, lacteo, dentibus 

 tribus rematis instructo ; labro margine crenato, intus calloso, 

 lacteo, plane Icevissima. 



