NEEITA.— Plate I. 



Neritm nigra, favescens, and kkroglyphka, Chemnitz. 



Ner'dcB bidens and bifaselata, Gmelin. 

 Ea/i. Philippine Islands, Mauritius, etc. 



Extremely variable in colouring and marking, but al- 

 ways characterized by its peculiar pinched form next the 

 spire. 



Species 3. (Fig. a, b, Mus. Cuming.) 

 Nekita ornata. Xer. testa globoso-turbinatd, soliiUs- 

 sima, sptrd exsertd, promirmld, anfraclibus superne 

 decUvibus, deinde roimidatis, undique dense spiralUer 

 cosfatis, eostis regidariiits, subplanatk, aperturd intm 

 i/icrassatd et serraid, area columellari corrngatd et 

 rude dentatd; albidd, eostis plus minus interrwpte 

 cmrnleo-mgricantibm. 

 The adorned Nekite. Shell globosely turbinated, very 

 solid, spire exserted, rather prominent, whorls slant- 

 ing at the upper part, then rounded, everywhere 

 closely spirally ribbed, ribs regular, rather flat, aper- 

 ture inwardly thickened and serrated, columellar area 

 wrinkled and rudely toothed ; whitish, ribs more or 

 less interruptedly blue-black. 

 SowERBY, Genera of Shells, No. 10. 

 Hab. Panama and Gallapagos Islands (on the rocks at 

 low water) ; Cuming. 

 The largest and most solid species of the genus, spi- 

 rally ilatly ribbed throughout ; the ribs being of moderate 



width, regular, and close-set, and coloured with blue-black 

 promiscuously interrupted with white. 



Species 4. (ilus. Cuming.) 

 Neetta quadricolor. Ner. testd siihglobosd, solidius- 

 culd, spird subexsertd, anfraclibus superne decUvibus, 

 deinde convexis, spiraliter costatis, eostis parviusciilis, 

 mcmerosis, suhirregularibus, aperturm fauce tenuiter 

 serratd, ared columellari sparsim granulatd et corrn- 

 gatd, ad marginem conspicue dentatd ; pallide roseo- 

 violaced, eostis irregulariter nigro maculatis, apice 

 lutescente. 

 The four-coloured Nerite. Shell subglobose, rather 

 solid, spire somewhat exserted, whorls slanting round 

 the upper part, then convex, spirally ribbed, ribs 

 rather small, numerous, somewhat irregular, interior 

 of the aperture finely serrated, columellar area; spar- 

 ingly granulated and wrinkled, conspicuously toothed 

 at the edge; pale pinkish-violet, ribs irregularly 

 spotted with black, apex yellowish. 

 Gmelin, Syst. Nat. (I3th edit.) p. 3684. 



Nerita maris rubri, Chemnitz. 

 Hab. Eed Sea. 



Colour, which in the preceding species is too variable 

 to be of any specific value, is in this species very charac- 

 teristic, the specimens being always of the same pinkish- 

 violet hue with yellow apex. 



