NERITINA. 



Species 89. (Fig. a to d, Mus. Cuming.) 



Nerita Soveebii. Ner. tedd glohosd, solidimculd, spird 

 vix exsertd, oblusd, anfractihus siipertie rude pUcato- 

 rugatis, deinde rotiindatis, rugis evanidis, aperturd 

 parvd, area columellari perdecUvi ; sordide grised, 

 carideo-nigro phm minus varie marmoratd ct fasciatd. 



Sowerby's Nekitina. Shell globose, rather solid, spire 

 scarcely exserted, obtuse, whorls rudely plicately 

 wrinkled round the upper part, then rounded, with 

 the wrinkles fading, aperture small, columeUar area 

 very slanting ; dull grey, more or less variably mot- 

 tled and banded with blue-black. 



Recluz, Sowerby, Thesaunis Conch, part 10. p. 528. 



Hab. Island of Luzon, Philippines (on the stony bed of a 

 small river) ; Cuming. 

 Distinguished by a characteristic globose nut-shaped 



form, variously mottled with blue-black and grey. 



Species 90. (Fig. a to/, Mus. Cuming.) 

 Neritina dubia. Ker. testa ovatd, spird leviler exsertd, 

 lulerali, anfradihus subangustis, rotmidatis, Icevibus, 



area columellari snhexcavatd ; fulvo-auraniid, fasciis 

 vel strigis undatis nigris varie pictd, interdum omnino 

 fulvo-aurantid, area columellari intense sanguined. 



The doubtful Neritina. Shell ovate, spire slightly 

 exserted, lateral, whorls rather narrow, rounded, 

 smooth, columeUar area faintly excavated ; fulvous- 

 orange, variously painted with black bands or waved 

 stripes, sometimes altogether fulvous-orange, with 

 columeUar area deep blood-red. 



Chemxitz, Conch. Cab. vol. v. p. 324-. pi. 193. f. 2019, 

 2020. 



Neritina fasciata, Lamarck . 

 Neritina zebroides. Lesson. 

 Neritina reticulata, Quoy and Gaimard. 

 Neritina Philipineann.,, Sowerby. 

 Neritina tiella, Busch. 



Gab. Eiver Pisag, Bay of Manilla (adhering to the piles 

 of wharfs) ; Cuming. 



Though varying considerably in pattern, the ground- 

 colour of this species is invariably a rich fulvous-orange. 

 The columeUar area is sometimes tinged, sometimes deeply 

 stained with blood-red, but verv rare in the latter state. 



November, 1855. 



