NERITA 



Plate III. 



Species 10. (Mus. Cuming.) 



Nerita grossa. Ner. testa ohliqne ovatd, solidd, spl)-d 

 parvd, vix exsertd, spiraliter costatd, costis rotundatis, 

 elevatis, interstitiis suhprofande excavatis, lira inter- 

 media prope aperturam, aperturd iutiis incrassatd et 

 serratd, ared columellari corrugatd et rude dentatd j 

 citiereo-grised, nigricante-olivaceo irregulariter articii- 

 latd, iipice lutescente. 



The stout Nerite. Shell obliquely ovate, solid, spire 

 small, scarcely exserted, spirally ribbed, ribs round, 

 elevated, interstices rather deeply excavated, with an 

 intermediate ridge next the apertm-e, aperture thick- 

 ened and serrated inwardly, columellar area wrinkled 

 and rudely toothed ; ash-grey, irregularly articulated 

 with blackish-olive, apex yellowish. 



LiNNiEUs, Syst. Nat. (10th edit.), p. 778. Deshayes, 

 Anim. sans vert. vol. viii. p. 61 1. 



Hab. Island of Burias, Philippiucs (on the reefs at low 

 water) ; Cuming. 



Distinguished by its raised rounded ribs and excavateil 

 interstices, articulated with a characteristic olive-brown 

 tone of colouring. 



Species 11. (Mus. Cuming.) 



Nerita nigekuima. Nir. testa ovato-globosd, crassd, 

 spird parvd, subexsertd, anfraetibm supente concavo- 

 planatis, deinde conveys, lavibus, spiraliter sulcato- 

 striatis, striis versus aperturam gradatim obsoletis, 

 aperturd intus incrassatd, tenue serratd, peculiariter 

 expansd, ared columellari subobscure corrugatd, leviter 

 denticulatd ; intense caruleo-nigrd, interdum albipunc- 

 tatd, ad aperturam lutescente. 



The very black Nerite. Shell ovately globose, thick, 

 spire small, rather exserted, whorls concavely flat- 

 tened at the upper part, then convex, smooth, spirally 

 groove-striated, strife gradually obsolete towards the 

 aperture, aperture thickened inwardly, finely ser- 

 rated, jjeculiarly expanded, columellar area obscurely 

 wrinkled, slightly toothed; deep blue-black, some- 

 times white-dotted, yellowish at the aperture. 



Chemnitz, Conch. Cab. vol. v. p. 309, pi. 193. f. 1985. 

 1986. 

 Nerita atcrrimu, Gmelin. 



A solid blue-black species, spirally groove-striated, the 

 strife becoming gradually fainter as they approach the 

 aperture, which is peculiarly rotundately expanded. 



Species 13. (Mus. Cuming.) 

 Nerita plexa. Ner. testd ovato-glohosd, spird plano- 

 compressd, anfraetibm spiraliter costatd, costis alter- 

 t/ritim latis et angtistis, subirregularibiis, undique ru- 

 goso-serratis, aperturd intus sub incrassatd, liratd, ared 

 columelhiri plano-excavatd, granuhitd, vix dentata ; 

 albd, macuUs carnleo-nigris subremote tessellatd, (tpice 

 et ared columelhiri luteo tinctis,fauce luted. 

 The platted Nerite. Shell ovately globose, flatly com- 

 pressed at the spire, whorls spirally ribbed, ribs al- 

 ternately broad and narrow, rather irregular, rugosely 

 serrated throughout, aperture slightly thickened with- 

 in, ridged, columellar area flatly excavated, granu- 

 lated, scarcely toothed; white, rather distantly tes- 

 sellated with blue-black spots, apex and columellar 

 area tinged with yellow, interior yellow. 

 Chemnitz, Conch. Cab. vol. v. p. 190. f. 19-14, 1945. 

 Nerita textiUs, Gmelin. 

 Nerita exuvia, Lamarck (not of Liuna?us). 

 Hub. Philippine Islands; Cuming. 



In this well-known species the dark spots are blue- 

 shaded and rather distant, on white ribs, which are alter- 

 nately broader and narrower, wliile the apex is impressly 

 flattened and yellowish. 



Species 13. (Mus. Cuming.) 



Nerita lineat\. Ner. testa oblongo-oraid, siibglohosd, 

 apice Idlcrali. piinim exsertd, anfractibus rotiindutis, 

 .■iiibiiiiyii^Ha, iiiliili dense spiraliter tenuiliratis, aper- 

 turd subinerassatd, serratd, ared columellari pland, 

 Icevigatd, rude minute denticulatd ; roseo-cinered, liris 

 piirpureo-nigris, ared columellari luteo tinctd. 



The lineated Nerite. Shell oblong-ovate, subglobose, 

 apex lateral, but little exserted, whoris rounded, 

 rather narrow, neatly closely finely spirally ridged, 

 aperture slightly thickened, serrated, columellar area 

 flat, smooth, rudely minutely toothed ; pink-ash, 

 ridges purple-black, columellar area stained with 

 yellow. 



June, 1855. 



