iNERITINA. 



Plate VI. 



Species 25. (Fig. n, h, c, Mus. Cuming.) 



Neeitina Donovan a. Nt'i-. testa suhglohosd,.'ijnrd ohlime 

 exsertd, mij'i-avl'ihiix xiipcrm' iln-l'iriliiia, dehide aiiijii- 

 latis, ad aiiijuliiiii npinis i-nrralis disluiiiiluis coronatls, 

 tenuUer cornyalu-drkUis, and coluMtilarl augustd, 

 iasin versus arcicatim sulcata, margiue minute graim- 

 latd; oUvaceo-liited, nigro strigatd ant subtlUler re- 

 tiridatd. 



Donovan's Neritina. Shell subglohoso, spire obtusely 

 exscrted, whorls slanting round the upper part, then 

 angled, coronated at the angle with ciu'ved distant 

 spines, finely wrinkle-striated, columellar area nar- 

 row, grooved in an arch towards the base, minutely 

 granuled at the edge ; olive-yellow, streaked or finely 

 reticulated with black. 



Uecluz, Sowerby, Thesaurus Conchylioruni. part Id. ]). 

 53(5. pi. 110. f. 39, 40. 



H'lli. Island of Guimaras, Philippines (on stones in a 

 small rivulet) ; Cuming. 



Distinguished by its very neatly reticulated pattern of 

 streaked markings, and by a small arched groove at the 

 basal end of the columellar area. 



Species 26. (Fig. a, b, Mus. Cumiug.) 



Neritina subpunctata. Ner. lestd globosd, erased, 

 ■sulidd, spird obtuse plauatd, unfraciibus supenie de- 

 c/ivibus, dei/tde obtuse ai/gulatis ef rotundatls, longi- 

 f/idinaliter snbrudi' plicuto-slriails, aperturd subex- 

 pansd, area coluiiiellari coiicavo-declivi ; olivaced, 

 striis siiboc/iraceis, interstltiis subpunclatis. 



The faintly-dotted Neeitina. Shell globose, thick, 

 solid, spire obtusely flattened, whorls slanting round 

 the upper part, then obtusely angled and rounded, 

 longitudinally rather rudely plicately striated, aper- 

 ture slightly expanded, columellar area concavely 

 slanting ; olive, stri.e yellowish, interstices faintly 

 dotted. 



Recluz, Pro. Zool. Soo. 1813, p. 199. 



Hub. Province of Xorth Ilocos, Island of Luzon, Philip- 

 pines (in a small mountain stream) ; Cuming. 



A solid shell, of somewhat rude obtuse structure, longi- 



tudinally plicately striated, the interstices being profusely 

 faintly dotted with colouring matter. 



Species 27. (Fig. a, b, c, d, Mus. Cuming.) 



Neeitina corona. Ner. tesld snbglobosd, spird vix ex- 

 sertd, arij'ractibns superii^ coneavo-declivibus, superficie 

 corrngato-striatd, deiiide augnlatis, ad angulwni spiuis 

 snbdistantibus eoronatis, infra convexis, lavigatis, area 

 columellari subaiigustd ; nigra vel olivaced, luteo vurie 

 fasciatd et ptinciatd. 



The ceown Neeitina. Shell snbglobose, spire scarcely 

 exscrted, whorls concavely slanting at the upper 

 part, with the surface wrinkle-striated, then angled, 

 crowned with rather distant spines at the angle, 

 below convex, smooth, columellar area rather naiTow ; 

 black or olive, variously banded and speckled with 

 yellow. 



Nerita corona, Linnreus, Sy.st. Nat. (13th edit.) p. 1352. 

 Neritina brnnspina, pars, Lamarck. 

 Neritina tnontacuta, Eecluz. 



Hah. Island of Burias, Philippines (on stones in rivulets) ; 



Mostly of a dark olive or sombre brown, variously 

 painted with yellow, now in bands, now in dots or splashed 

 speckles. 



Species 28. (Mns. Cuming.) 

 Neeitina beevispina. Ner. testa snbglobosd, spira cix 

 exsertd, obtusd, anfractibns svperne plano-decUvibus, 

 deinde angulatis, spinis ad angulnw eoronatis, uudique 

 conspicne corrugato-striatis, area colmnellari suhan- 

 gustd, coHcaw-declii-i; olivaced,fusco pins viiniis tinctd. 

 The siioRT-spiNED Neeitina. Shell subgloljose, spire 

 scarcely exscrted, obtuse, whorls flatly slanting at 

 the upper part, then angled, coronated with spines 

 at the angle, everywhere conspicuously wrinkle-stri- 

 ated, columellar area rather narrow, concavely slant- 

 ing ; olive, more or less brown-tinged. 

 Lamarck, Anim. sans vert. vol. viii. p. 572. 

 Nerita corona anstralis, Chemnitz. 

 Clillion variabilis, Lesson. 

 Ilab. Philippine Islands ; Cuming. 



Of smaller .size than the preceding species, conspicu- 

 ously wrinkle-striated throughout. 



October, 1S55. 



