NERITINA. 



Figj. 11-3 and 14G. (Mus. Cumiug.) 

 The shuUs here figui-ed represent respectively the N. 

 Immvenalis, Ziegler, and N. rarispina, Recluz, and are 

 varieties of the European N.fluviatiUs. 



Species 144. (Fig. a, h, Mus. Cuming.) 

 Nekitina TRiSTis. Ner. fenUl subylobosd, spird pand, 



mhexserld, lavigatd, arvd rolumellari declivi ; cteru- 



ho-niyrd, puncth attls dfiisS aspersd. 

 TnK SAD Neritina. Shell subglobose, spire small, 



rather exserted, smooth, eolumellar area slanting; 



hlue-black, densely sprinkled with white dots. 

 D'Orbigny, Hist. Moll. Cuba. 

 IM. Cuba. 



A small pea-shaped species of a dark blue-black colour, 

 densely sprinkled with minute white dots. 



Species 145. (Fig. a, /;, Mus. Cuming.) 

 Neritina Adansoniana. Ner. testa oblique conicd, 

 crasuusculd, spird obtusd, aufractibus declivibus, basi 

 iumidiifsculis, area columellari callosd ; ftilnd, Uneis 

 nigris reticulalis vel strigatis. 



Adaxson's Neritina. Shell obliquely conical, rather 

 thick, spire obtuse, whorls slanting, rather swollen at 

 the base, eolumellar area callous ; fulvous, reticulated 

 or streaked with black lines. 



Recluz, Revue Zool. Soc. Cuvierienne, 1S41, p. 313. 



Hab. Senegal. 



Of a solid conical form, with an obtusely exserted spire. 



Species 147. (Fig. «, b, Mus. Cuming.) 



Neritina tuifasciata. Ner. testa subcompresse ovatd, 

 teiiiii, semipellHcidd, spird parvd, obtuse planatd, an- 

 fractibus stibangttstis, lavibits, area columellari ampld, 

 plano-coiicavd ; pallid^ cinered, nigricante pallidi tri- 

 fasciutd. 



The tiieee-banded Neritina. Shell somewhat com- 

 pressly ovate, thin, semipellueid, spire small, ob- 

 tusely flattened, whorls rather naiTow, smooth, eolu- 

 mellar area large, flatly concave ; pale ash-colour, 

 encircled with three faint blackish l)ands. 



Mexke, MS. Mus. Cuming. 



Hab. ? 



Closely aUied to the European N. jtuoiatilis, but having 



the spire flattened. 



Fel)ruary, 1856. 



