386 Zoological Society. 



Nerita Powisiana. Ner. testd ovato-transversd, ventricosd, su- 

 perne depresso-planiusculd, varie pictd ; sjnrd brevissimd, derosd, 

 auriculd elevatd, marginatd ; aperturd ovatd, dilatatd, externe sub- 

 rectd ; labia pianissimo, antice recto, acuto et sub lente ruguloso. 



Var. a. Testd lutescente, nebulis pallidis vix purpurascentibus vari- 

 egatd. 



Var. fl. Testd ut in var. a, maculis nigerrimis characteriformibus, 

 triseriatim cinctd. 



Var. y. Testd luteo -fusee scente , lineolis nigris undulatis, longitudi- 

 nalibus, dense notatd. 



Hab. Var. a and /3, New Ireland, in mountain-streams, by R. B. 

 Hinds, Esq., Surgeon of H.M.S. Sulphur. 



Long. 19 mill.; lat. 14 mill.; convex. 12 mill. 



Species valde mirabilis. Var. y. Hab. } Mr. Powis. 



Nerita Turtoni. Ner. testd ventricoso-ovatd, luteo-rufd sen rubi- 

 cundd, Jlammis nigrescentibus undatis, remotisque, sive angulato- 

 flexuosis pictd ; anfractibus 4—5, convexis, supremis derosis : injimo 

 superne horizontaliter depresso ; labio subconvexo, fusco-rubente, 

 margine in medio tenuiter crenato, basi leviter emarginato ; labro 

 intus calloso-albo, ad marginem fusco rubente. 



Hab. ? Mr. Powis. 



Long. 15i mill. ; lat. 13 ad 14 mill. 



Nerita variegata, Lesson (Ner. pulchra, Sowerby), vald^ affinis. 



Nerita nebulata. Ner. testd ovato-globosd, tenuiter striatd, luteo- 

 fuscescente, lineis nigris squamceformibus parvulis nebulatd ; spird 

 prominuld, rotundatd ; labio angustato, subconvexo, margine retius- 

 culo, crenulato, flavescente ; labro semi-ovato, intils cterulescente, 

 margine Jiavo. 



Hab. Immimaylan, in a mountain-stream. 



Long. 10 mill. ; lat. 11 mill. ; convex. 8 mill. 



Nerita Mertoniana. Ner. testd ovato-globosd, maculis pallide lu- 

 tescentibus zonisque articulatis nigro-purpurascentibus Jimbriatis 

 cinctd ; spird vix prominente, rotundatd, apice eroso ; aperturd ob- 

 liqud, luteold ; labio subconvexo, angusto, mxirgine tenue arcuato et 

 crenulato. 



Var. /3. Testa major, lineolis intricatis picta. 



Hab. cum preecedente. 



Long. 9 ad 10 mill. ; lat. 11 ad llf mill. ; convex. 7f ad 8 mill. 



Affinis Neritce Oualaniensis, Lesson, sed major, solidior, minus ro- 

 tundata et variegata : non var. robustior. 



Nerita Michaudiana, Recluz in Rev. Cuvierienne, Paris 1841. 



Var. /3. Testa rotundata, suprH medium spinis angustis brevibusque 

 armata. 



Hab. cum typo ad " Bunang, province of Pangasinan, isle of Luzon, 

 on small stones on the bank of a river." DD. Souleyet et Cuming 

 invenierunt. 



Nerita Jovis. Ner. testd ventricoso-ovatd, nigrd, lineolis angulato- 

 flexuosis fulgurantibusve albis pictd, punctatdque ; anfractibus 

 quinis convexis ; .spird conico-depressd, nigro-violusccnte, albo 



