132 Zoological Society. 



conicdy apice erosd ; aperturd subrotundd, mills albd et pallide 

 ccerulescente 3-4 fasciatd ; labio compresso, angusto, valde de- 

 clivi, superne transversim calloso, margine crenato et in medio 

 tenuiter arcuato ; labro inferne dilatato, superne subfornicato. 

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



4. Nkrita Leachii, Recluz in Guerin, Rev. Cuvier. 1841, p. 312. 

 no. 33. 



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



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



triangularibus obsitd, nee fasciatd. 

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

 Var. d. ? Testd semiglobosd, tenuiore, striis longitudinalibus regu- 



laribus creberrimis, transversis, tenuissimis, nigerrimd, maculis 



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



vulis triangularibus pallidioribus confertis pictd. 

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



5. Nerita Sayana. Ner. testd ventricoso-ovatd, longitudinaliter 

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

 centibus, diversiformibus, variegatd aut fused et nigrescent e nebu- 

 latd ; anfractibus duobus ; primo partim deroso, infimo superne 

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

 declivi, margine recto, in medio tenuissime crenato. 



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

 Cuming. 



6. Nerita (Clithon) 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 perforato ; aperturd extus subrotundd, in- 

 tus albo-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 scepius sulcato ; labio superne emarginato. 



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

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

 tudinalibus creberrimis sculptd ; anfractibus sordide nigro-vio- 

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

 acutd ; aperturd pallide fuscescente ; labio planulato, margine 

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

 lariter sulcato, 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, 

 transversim sulcatd, longitudinaliter crebre striatd ; costis subter 

 lente subgranosis ; spird conico-acutd ; labio piano, lacteo, dentibus 

 tribus remotis instructo ; labro margine crenato, intiis calloso, 

 lacteo, plane Icevissimo. 



