NERITINA. 



Plate XXXI. 



Species 13y. (Fig. n, h, Mus. Cuming.) 



Neritina Macri. Ner. testa ovatd, spird subexsertd, 

 plus minus erosd, anfractibus superne leviter impressis, 

 cleinde convexis, 1/svibns, area cohtmelluri decUvi ; ni- 

 tente-atrd. 



The Macri Neritina. Shell ovate, spire slightly ex- 

 serted, more or less eroded, whorls faiutly impressed 

 round the upper part, then convex, smooth, columel- 

 lar area slanting -, shining black. 



Recluz, Sowerby, Thesaurus Conch, part 10. p. 531. pi. 

 116. f. 222. 



Hab. Asia Minor; Lieutenant Spratt, R.N. 



A small shining jet-black species, with the spii'e gene- 

 rally more or less eroded. 



Species 140. (Fig. a, b, Mus. Cuming.) 



Neritina carinata. Ner. testd subglobosd, spird pla- 

 natd, plus muiiis erosd, anfractibus superne concam- 

 angulatis, deinde rotutidato-carinatis, infra convexis, 

 ared columelhiri decliri ; pallide virescenfe, lineis oll- 

 caceo-nigrisjlexuosis confertim pictd. 



The keeled Neritina. Shell subglobose, spire flat- 

 tened, more or less eroded, whorls concavely angled 

 round the upper part, then rotundately keeled, con- 

 vex beneath, columellar area slanting; pale green, 

 painted with close-set flexuous, olive-black lines. 



Koch, Sowerby, Thesaurus Conch, part 10. p. 516. pi. 

 114. f. 157, 15S. 



Hab. ■? 



Strongly characterized by a prominent rounded keel, 

 which gives a concavely angled structure to the upper part 

 of the whorls. 



Species lU. (Fig. «,/., c, r/, Mus. Cuming.) 



Neritina Mertoniana. Ner. testd ovatd, suhjlobosd, 

 solidd, spird parnm exsertd, obtusd, anfractibus con- 

 vexis, lavibns, nitentibus, ared columellari plus miiias 

 callosd ; fjriseo-albd, itigricante varic retictdutd et 

 fasciatd. 



Merton's Neritina. Shell ovate, subglobose, solid, 

 spire but little exserted, obtuse, whorls convex, 

 smooth, shining, columellar area more or less callous ; 

 greyish-white, variously reticulated and banded with 

 black. 



Eeclcz, Pro. Zool. Soc. 1843, p. 71. 

 Neritina nehulata, Recluz. 



Hab. Island of Negros, Philippines (on stones in a small 

 stream) ; Cuming. 

 A subglobose callous shining species, variously rcticu- 



lately banded and enlaced with black upon a greyish-white 



ground. 



Species 142. (Fig. a, b, Mus. Cuming.) 



Neritina Rangiana. Ner. testd oblongo-ovatd, depre.'ixd, 

 Haliotidiformi, .^pird pared, iJj/iiw e.r.si'rid, anfractibus 

 superne rude angulatis, dfiii<h' pliimitis, urea columel- 

 lari subampld, callosd ; pitHiili- virrnvinde, liiieis Jlcx- 

 uosis nigris, opaco-alho margiuatis. 



Rang's Neritina. Shell oblong-ovate, depressed, ila- 

 liotis-shaped, spire small, obtusely exserted, whorls 

 rudely angled round the upper part, then flattened, 

 columellar area rather large, callous ; pale green, 

 marked with flexuous black lines, edged with opake 

 white. 



Recluz, Revue Zool. Soc. Cuvierienne, 1841, p. 339. 



Hab. Dumaguete, Island of Negros, Philippines (on stones 

 in a small stream) ; Cuming. 

 This species, it will be observed, is of a very peculiar 



form, and singularly niarknl. 



February, 1850. 



