Zoological Society. 887 



punctatd, acutd ; aperturd albo-virescente ; labia piano, margine in 

 medio vix arcuato ac denticulato. 



Hah. ? Mr. Powis. 



Neritince lugubris, Lamarck, vald^ affinis, sed solidior, minor, co- 

 lore denique propria. 



Nerita cuprina. Ner. testd ventricoso-oblongd, subepidermide cu- 

 preo-micante nigrd, lineolis angulato-flexuosis densissim^ pictd ; 

 anfractibus 4-5 ? convexis, superne rotundatiusculis ; apice deroso ; 

 labio piano, lutescente, in margine vix arcuato et denticulato, basi 

 subemarginato ; labro inths albido-ccerulescente, ad marginem luteo- 

 viridescente . 



Hah. ? Mr. Powis. 



Long. 12 mill. ; lat. 11 mill. 



Affinis Neritcc Royssiance, Reel., sed colore et epidermide notabili 

 diversa. 



Nerita Pfeifferiana. Ner, testd ventricoso-ovatd, ni^rd, albido- 

 lutescente bizonatd ; zond mediand spiram decurrente ; anfractibus 

 quaternis, convexis, ad suturam minime marginatis ; apice decorti- 

 cato, obtusiusculo ; aperturd rotundatd ; labio compresso, concavi- 

 usculo, albido, in margine arcuaflm ac obtuse denticulato ; denticulis 

 obsoletis, cardinali productiusculo ; labro dilatato, tenui, nigro- 

 ccsrulescente et luteo quadrifasciato. 



Hah. From New Ireland, in a mountain -stream, by R. B. Hinds, 

 Esq. 



Long. 8 mill. ; lat. 7 mill. ; convex. 4 mill. 



Species elegans, rarissima. Columella extiis zond angustd, e punctis 

 moniliformibus seriatis cincta. 



Nerita apiata. Ner. testd ventricoso-globosd, tenuissimd, rugosd, 

 subepidermide olivaced fusco-violascente, lituris transversis albi- 

 dis pictd ; anfractibus quaternis superne depresso-planulatis ; spird 

 prominuld, apice pulchre croceo, hyalino ; aperturd dilatatd ; labio 

 semilunari, nigrescente externe zonato, antice albo, recto, integer- 

 rimo. 



Hah. Island of Negros ; in mountain- streams, on stones. 



Long. 11 mill. ; lat. 14J mill. ; convex. 10| mill. 



Affinis variet. Nerita dubia, sed columella basi non emarginata 

 diversa est. Columella in centro parum inflexa. 



Nerita Donovana. Ner. testd semiglobosd, tenuiter et dens^ stri- 

 atd, viridescente, lineis obliquis purpureo-nigris, undatis, cequidi- 

 stantihus ornatd ; anfractibus tribus convexis, supra medium spinis 

 curvatis armatis ; apice deroso ; aperturd cccrulescente, basi effusd 

 angulatdque ; labio angusto, superne calloso, basi concavo, margine 

 subrecto, denticulato ; dente cardinali majori. 



Var. f). Ovata, nitida, maculis viridibus et purpureis, dense intricata ; 

 ultimo anfractu superne adscendente ; spird prominuld, convexd. 



Hab. Island of Guimaras, on stones in a small stream. 



Long. 12^ mill. ; lat. 15 mill. ; convex. 10 mill. 



Var. /3. Long, 14 mill. ; lat. 15 mill. ; convex. 11 mill. 



2C2 



