N l] K I r A 



I'l.A 



Species 15. (Mas. Cuming.) 



Nerita Le Guillouan.\. Ner. testa mbovnto-globosd, 

 crassd, spird subuxsertd, anfracti/iii-i declivi-cnnvexis, 

 spiraliter costatis, costis coiifer/ix, /jam's, ,,/n/io H 

 juxta suturam majoribws, ttpniiurd i.imi.ssnlil ,7 si-r- 

 ratd, area columellari incrnsmtd d jiromiM-ih- cor- 

 rugntd, dentatd; cinereo-albd, ynseo-olwaceu macn- 

 latd et variegatd, apice luteo. 

 Le GuiLLOu's Nerite. Shell subovately globose, lliick, 

 spire a little exserted, wbovls slantingly convex, spi- 

 rally ribbed, ribs close-set, small, larger in the middle 

 and next the suture, aperture thickened and serrated, 

 columellar area thickened and promiscuously wrinkled, 

 toothed ; ash-white, mottled and variegated with grey 

 olive, apex yellow. 

 Uechjz, Rev. Zool. Soc. Cuvierienue, 18-t2, p. 17S. 

 Ihib. Philippine Islands. 



A solid finely-ribbed species, ricidy mottled and \ nric- 

 gated throughout with greyish-olive, the apex being yel- 

 low, and the columellar area much swollen and wrinkled. 



compressed towards the spire, spire seai'cely exserted, 

 whorls spirally grooved, grooves linear, rather close- 

 set, aperture thickened and slightly serrated, largely 

 expanded, columellar area obsoletely wart-wrinkled, 

 toothed; grey-black, sparingly interrupted with ash- 

 white, columella faintly yellowish. 



Eecli;/,, Eev. Zool. Soc. Cuvierienne, 1843, p. 170. 



H(d}. Australia. 



An nliloiig solid shell, ratlier compressed near the spire, 



and lioUllv exiianded at the aijcrture. 



Species 16. (Mus. Cuming.) 



Nerita atrata. Ner. teaf/i semif/lobond, crassd, spird 

 viv exscrld, (iiifriiclihus rolntidnl'ix^ jiixia spi.ram com- 

 pressis, spiniViler i'I,'nilo-\lriiilis, nperturd vaUle iii- 

 crassald, levilrr si'rruh!, rol u iidnto-expansd, ared co- 

 Inmellari coitrard, iniitiiti denluld; carboiiarlo-atrd, 

 inter slr'ws jmllidd. 



The rlack Nerite. Shell .semiglobosc, thick, spire 

 scarcely exserted, whoris rounded, compressed next 

 the spire, spirally elevately striated, aperture much 

 thickened, slightly serrated, rotundately expanded, 

 columellar area concave, minutely toothed ; coal- 

 black, pale between the stride. 



Chemnitz, Couch. Cab. vol. v. pi. 19i». p. 296, f. i:).-jt, 

 1955. 



Hab. Bay of Islands, New Zealand. 



The surface of this species is not dcprcssly grooved, as 



described by Lamarck, but merely finely linearly impressed, 



or, as Chemnitz characterizes it, " lineis obsoletis vi\ nia- 



nifestis in fundo nijierrimo circumdata." 



Species 17. (Mus. Cuming.) 

 Nerita Madra. Ner. tesld oblonyo-ovald, crassd, solidd, 

 spiram versus compressd, spird vix exsertd, anfractl- 

 biis spiraliter suJcatis, sulcis linearibus, sicbcot/fertis, 

 nperturd incrassaid et leviler serratd, amplitir cr- 

 pausd, ared columellari obsolete verrucoso-corriujnld, 

 dentatd ; grlsm-iiiijrivinilf, ciin'rco-allio uparsiui inter- 



riiptd, Cohtwelhl lialVnli- 1,,1,'srriilr. 



The Moor Nerite. Shell obloii'^-ovate, thick, solid, 



Species IS. (Mus. Cuming.) 

 Nerita ciirysostoma. Ner. lesld orutd, Tnrhiuifonni, 



siilciitil, s/i/cis liiimriiiii.K, siihirnyiilarihiix, iiprrliird 

 iiicra.sxdtd I'l xi'rrnld, siiliexpaiisd, ared culnvirlliin 

 proiiiixriii^ corritgntd, di'iilald ; sordide httescente-albd, 

 iiiiiriciiiite-oliriu'eojh'xiinso-variegatd, ared columellari 

 et aperturd rHelUuis. 



The oolden-mouthed Nerite. Shell ovate, Turbo- 

 shaped, thick, spire exserted, whorls convex, spirally 

 grooved, grooves linear, rather irregular, aperture 

 thickened and serrated, rather expanded, columellar 

 areapromiseuniisly wrinkled, toothed ; dull yellowish- 

 white, flexnnu-l\ \;irie'j:iii (1 with blackish-olive, aper- 

 ture and columellar are.i tinged with yclk-ycllow. 



Recluz, Rev. Zool. Soc. Cuvierienne, 1841, ]). 10-t. 



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

 water) ; Cuming. 

 This species when laid upon the aperture has, moi-e 



than any other, the aspect of a Tnrhn, having externally 



the typical form, sculpture, and marking of that genus. 



Species 19. (Mus. Cuming.) 



Nerita semikigosa. Ner. testa oblougn-globosd, solidd. 

 spird phiiin-rniiciiri!, apice r.rserld, inifnirl'dius liris 

 coiijcrlis iiilidi' yiiraliirr fiiiiiriditlis. iiprrlnrd iii- 

 crassntd id srrrald, ared cohimidUiri xvuiiriKjiisd, d,-n- 

 tatd; olivaceo-ciiiered, Jlammis ut/datis ro.iaceis el ui- 

 gris oblique iiebulatis, apice Inteo. 



The half-wrinkled Nerite. Shell oblong-globose, 

 solid, spire flatly concave, with the apex exserted, 

 whorls neatly spirally corded witli close-set ridges, 

 aperture thickened and serrated, columellar area half- 

 wrinkled, toothed; olive-ash, obliquely clouded with 

 waved pink and black flames, apex yellow. 



Reclu/,, Rev. Zool. Soc. Cuviei ieiiui'. IsH, ]). 102. 

 Eadem var. Nerita Ql,e.n,i!:,i . IJ.vlnz. 



Hab. Island of Tcrnate, Moluccas. 



Distinguished by the neat regularity of its corded 



ridges and oblifjuc flame-clouded colouring. 



