NERITINA 



Plate XXIV, 



Species 105. (Figs. 101, 105, Mus. Cuming.) 



Nekitina Layardi. aw. icntd oiaUi, valde depressd, 

 teii-iil, j)eUiiciJd, fipird ohliqiii intortd, deeussafim stri- 

 ata, an'd colimii'Uari perampld, snperne quadrato- 

 alntd; olkaceo-corned, niijro temii retiodaid. 



Layauu's Nekitina. Shell ovate, very depressed, thin, 

 transparent, spire obliquely turned in, decussately 

 striated, columeUar area very large, quadrately winged 

 at the upper part; olive-horny, finely reticulated 

 with black. 



Ilah. Cevloii; F. Layard, Thwaites. 



Ufa subtransparent horny texture, conspicuously square- 

 winged at the upper part. 



Species 100. (Fig. «, h, Mus. Cuming.) 



Neritis'a Solomonensis. Xat. testa oljUquu ovatd, sub- 

 di'prcsm, spird parvd, fere olsoletd, aiifractihus con- 

 vexis, concentric!; lirato-striatis, apertiird sitbexpansd, 

 area culnmeUari ainpld, callom, jiixla apicem sinuatd ; 

 olirdceii-lirviiiivd, iiiijro oljucure reticidatd, area colu- 

 Tiietluri xnmjiiliK'O-carneuln. 



The Solomon Island Nekitina. Shell obliquely ovate, 

 rather depressed, spire small, almost obsolete, whorls 

 convex, concentrically ridge-striated, aperture rather 

 expanded, columellar area large, callous, sinuated 

 ne.xt the apex ; olive-brown, obscurely reticulated 

 with black, columellar area blood-stained carnelion. 



Hat). Solomon's Island. 



A very characteristic species in form, and also in sculp- 

 ture and eolourins;. 



Species 107. (Fig. a, b, ;\Ius. Cuming.) 



Nekitina Novo-Caledonica. Nat. testd depresse ovatd, 

 teiiaicnld, radiatiiii elevato-striatd, spird obliqiii: in- 

 tortd, ared coliimellari ampld, subdilatatd ; .wrdide 

 nigra, iutna cariite.xente, ared colnmellari pallide car- 

 ncold. 



The New Caledonia Neritina. Shell depressly ovate, 

 rather thin, radiately elevately striated, spire obliquely 

 turned in, columellar area large, slightly dilated ; dull 

 black, interior blue, columellar area jiale carnelion. 



Hab. New Caledonia. 



This species also presents a distinct typical character, 



thinly ovately expanded within, radiately striated witliout. 



Species 108. (Fig. a, b, JIus. Cuming.) 



Nekitina acigulata. Nat. testa depresse ovatd, tenui- 

 ciild, spird pared, oblique laterali, arifractibus suban- 

 gustis, dense radiatim striatis, aperturd dilatato-e.v- 

 pansd, area cotumeUari decliei, margine denticutatd ; 

 sordide nigra. 



The suakp-euged Nekitina. Shell depressly ovate, 

 rather thin, spire small, obliquely lateral, whorls 

 ratlier narrow, closely radiately striated, aperture di- 

 lately expanded, columellar area slanting, denticu- 

 lated at the margin ; dull black. 



MoRCH, MS. !Mus. Cuming. 



Hab. Island of Nicobar. 



Of light substance, chiefly characterized by an obliqui' 



convolution of the ^inre, and dilately expanded aperture. 



November, 1S55. 



