201 



Far. flavescens fasciis duabus nigris. 

 Hub. ad Real Llejos, in fluvio, rupibus adhaerens, 

 A very curious species, probably the analogue of Stroynbus latissinms 

 among the river shells.— W. J. B. 



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

 alhido-fuscd llneis nigris angulatis reticulata; spird oblique in- 

 curvd ; labro tenui supern^ sub-biauriculato ; labio subarcuato, 

 denticulato : long. 1, lat. -S- poll. 



Hub. ad insulam Taheiten in rivis, saxis adhasrens. 



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

 from it.— W. J. B. 



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

 quasi giittatd, guttarum linibis nigricantibus ; labio subrugoso, 

 denticulato : long. ] , lat. 1 poll. 



Hab. ad Chiriqui Colombiae Occidentalis in fluvio. — W. J. B, 



Neritina Nux. Ner. testd ov at o- globosd, fused, longitudinaliter 

 striatd, striis creberrimis ; labio serrato, unidenticulato : long.^, 

 lat. ^ poll. 



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



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

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

 cante ; columellari subjlavo, planulalo, 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 Jlavd ; 



labii columellaris margine obtuse unidentatd, rugulosd : long. O'b, 



lat. 0"55 poll. 

 Hab. ad Insulam Taheiten. 

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



Neritina picta. Ner. testd subglobosd, cinerascente, macuUs, 

 sphacclis, vittisque diversimodo pictd ; labio interna castaneo : 

 long. 0'5, lat. 04 j/oll. 



Hab. ad Panamam. 



Found in abundance on a mud-bank partially overflowed with 

 fresh water, — G. B. S. 



Neritina ueticulata. Ner. testd subovali, iransversim 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 striatd; alrd ; 



