NERITINA 



Plate XXXIV. 



Species 153. (Fig. a, b, Mus. Cumiug.) 



Neritina vibidis. Nei\ testa, oblique civali, spird parvd, 

 parmn exsertd, anfmctibm convexis, subcaiffustis, lavi- 

 bus, Hiteutibus, area columellari callosd ; pellucido- 

 virescente, pmictk albis Unmqite iM/ris cnpiMarlbi/s 

 mrieijatd. 



The okeen Neeitina. Shell obliquely oval, spire small, 

 but little e.xserted, whorls convex, rathei- narrow, 

 smooth, shining, columellar area callous : transparent 

 green, variegated with black hair lines and white 

 dots. 



LiNN^us, Syst. Nat. (12th rdit.), p 12.54. 



Hab. West Indies. 



Chiefly distinguished by its narrow nbl 

 form, and semitransparont substance. 



ivate 



and Wttn 



Figs. 154 and 156. (Mus. Cuming.) 

 The specimens iiere figured represent the N. Michaudi 

 <ia nl' Becluz, and are varieties of N.fliiviatilis. 



Species 155. (JIus. Cuming.) 

 PREVOSTIANA. Ner. ledd Hnbobllque ovali. 



spird inliJe tiirbi until, niifriictibus co/wexin, snbangus- 

 tis, area ciiliimflhiri e.rcavato-planatd ; intense caru- 

 leo-nigrd. 

 Puevost's Neritina. Shell somewhat obliquely oval, 

 spire neatly turbinated, whorls convex, rather narrow, 

 columellar area excavately flattened ; deep blue- 

 black. 



SOWEKBY, Conch. Illus. |) If) 

 Hab. ? 



Of a rather narrow uljli(|uely oval fori 

 ing blue-black. 



very dark shin- 



Species 157. (Fig. a, b, Mus. Cumiug.) 



Neritina Nilotica. Ner. testa subgloboso-ovatd, spird 

 subexsertd, unjractibus rotundaiis, area columellari 

 subcallosd ; hdescente, olivaceo dense lineatd. 



The Nile Neeitina. Shell somewhat globosely ovate, 

 spire a little exserted, whorls rounded, columellar 

 area rather callous ; yellowish, densely lineated with 

 olive. 



Hab. Banks of the Nile. 



Of a peculiar subglobose fornj, painted with close-set 



waved olive lines upon a yellowish t;-round. 



