NERITINA. 



Plate VII. 



Species 29. (Figs. 29, 32, and 33, Mus. Cumiug.) 



Nekitina zigzag. N'er. testa oblonyo-ylobosd, spird siii- 

 promimdd, mifractihus superue dedixibus, deiiide con- 

 vexis, laviffatis, area columdlari mbangHstd, marybie 

 nd>/ii(e denticidatd, apertiird mhangmtd ; oUcaceo- 

 nlgrd, macuUs Ittteis trigonii vel strigis tmdatis nUkle 

 picta. 



The zigzag Nekitixa. Shell oblong-globose, spire 

 rather prominent, whorls slanting at the upper part, 

 then convex, smooth, columellar area rather narrow, 

 minutely toothed at the edge, aperture rather small ; 

 olive-black, neatly painted with triangular yellow 

 spots or zigzag streaks. 



Lamakck, Anim. sans vert. vol. viii. p. 570. 



Hab. Pacific and Pldlippine Islands ; Cuming. 

 The shells represented at Figs. 29, 32, and 33 of the 



accompanying Plate illustrate three characteristic varieties 



of this species. 



Species 30. (Mus. Cuming.) 



Neeitina plumb e a. Ner. teatd subglobosd, tumidimcnld, 

 spird acnmhiato-productd, anfractibtm siiperne con- 

 cavo-dedivibus, conceatrice tortnoxo-striatis, area co- 

 lumellari suhangnsid, h/iuitlu nidi dodkulald ; oU- 

 vaceo-plumbed, immamlatd. 



The leaden Neritina. Shell subglobose, rather 

 swollen, spire acuminately produced, whorls con- 

 cavely slanting round the upper part, concentrically 

 tortuously striated, columellar area rather narrow, 



minutely rudely toothed ; olive - lead colour, un- 

 spotted. 



Recluz, Sowerby, Thesaurus Conch, part 10. p. 538. 

 pi. 112. f. 119 and 120. 



Hab. Island of Bohol, Philippines ; Cimiiug. 

 Of a imiform dull leaden-olive colour, rather 



slanting round the upper part of the whorls. 



sly 



Species 31. (Mus. Cuming.) 



Neritina tuurita. Nvr. testd oblongo-globusd, tumidi- 

 vsculd, spird acumii/afd, anfradihux .siiporne di-clivi- 

 bus, deiitde convexis, Itcmgatis, area columdlari twiuidd, 

 margine miu/ite rude deiiticulald, tiperturd mbex- 

 pansd; nigra, olivaceo-luteo longitiidimdikr drigutd, 

 area columdlari palUde cameold. 



The tukreted Neritina. Shell oblong-globose, rather 

 swollen, spire acuminated, whorls slanting round the 

 upper part, then convex, smooth, columellar area 

 swollen, minutely rudely denticulated at the edge, 

 apertui-e rather expanded ; black, longitudinally 

 streaked with orange -yellow, columellar area ])ale 

 carnelion. 



Nerita turrita, Chemnitz, Conch. Cab. vol. ix. part 3. 

 p. 71. pi. 12-i. f. 1085. 

 Neritina strigiUala, Lamarck. 

 Neritiua Boi/ssiaiia, liecluz. 



Hab. Madagascar. 



Distinguished chiefly from N. zebra by its oblong tiir- 



reted form. 



October, 1855. 



