201 



Far. flavescens fasciis duabus nigris. 

 Hab. ad Real Llejos, in fluvio, rupibus adherens. 

 A very curious species, probably the analogue of Strombus latissimus 

 among the river shells. — W. J. B. 



Neritina dilatata. Ner. testd ovato-truncatd, dorso convexo, 

 albido-fuscd lineis nigris angulatis reticulatd ; spird oblique in- 

 curvd ; labro tenui superne sub-biauriculato ; labio subarcuato, 

 denticulato : long. -§-, lat. -&■ poll. 



Hab. ad insulam Taheiten in rivis, saxis adhaerens. 



A species approaching Ner. auriculata, Lam., but verv distinct 

 from it.— W.J. B. 



Neritina globosa. Ner. testd globosd, Jlavescente vel fused, 

 quasi guttatd, guttarum limbis nigricantibus ; labio subrugoso, 

 denticulato: long. \,lat. 1 poll. 



Hab. ad Chiriqui Colombian Occidentalis in fluvio. — W. J. B. 



Neritina Nux. Ner. testd ovato-globosd, fused, longitudinaliler 

 striatd f striis creberrimis ; labio serrato, unidenticulato : long.%, 

 lat. £ poll. 



Hab. ad insulam Taheiten in rivis, saxis adhserens. — W. J. B. 



Neritina intermedia. Ner. testd suborbiculari, olivaceo-fuscd, 

 nigro reticulatd ; dorso subgibboso, labio externo intus Icevi, albi- 

 cante ; columellari subflavo, planulato, margine centrali rugulosd : 

 long. 0*75, lat. 085 poll. 

 Hab. in America Centrali. 



Found abundantly on stones in a mountain stream in the Isle of 

 Lions, Bay of Montejo. It bears a distant resemblance to Ner. pulli- 

 gera. A smaller variety occurs in a rivulet at San Lucas in the Gulf 

 of Nocoiya.— G. B. S. 



Neritina chlorostoma. Ner. testd suborbiculari, ellipticd, oli- 

 vaceo-fuscd, nigro reticulatd, subfasciatd ; aperturd intus flavd ; 

 labii columellaris margine obtuse unidentatd, rugulosd : long. 0*5, 

 lat. 0*55 poll. 



Hab. ad Insulam Taheiten. 



Found on stones in the rivulets. — G. B. S. 



Neritina pigta. Ner. testd subglobosd, cinerascente, maculis, 

 spkacelis, vittisque diversimodo pictd ; labio interno castaneo : 

 long. 0'5, lat. 0*4 poll. 



Hab. ad Panamam. 



Found in abundance on a mud-bank partially overflowed with 

 fresh water. — G. B. S. 



Neritina reticulata. Ner. testd subovali, transversim striatd, 

 aterrimd, albo reticulatd et maculatd; aperturd omnino lutescente : 

 long. 0-45, lat. 0-48 poll. 

 Hab. ad Insulas Polynesias. 



From Lord Hood's Island ; found in fine sand on the reefs, oc- 

 casionally overflowed. — G. B. S. 



Neritina Morio. Ner, testd subovali, transversim striata, atrd ; 



