528 



planulata ; apertura alba ; labio piano, angusto, margine arcuato et 

 ruguloso." 



Rather square, with the spire rather flattened, and the whorls 

 obtusely angulated above; colour tending to rose, with wliite 

 spots, black-edged, and the epidermis light green. It is quite 

 possible that this may be a spineless variety of N. crassispina. 



Philippine Islands. Cuming. 



70. Neritina Soverbiana (pi. cix. f. 5-8), Recluz, MS. 



~N .test&N.avellance simili, sed subplicata, varie picta; anfractibus 

 vix angulatis, super angulum magis elevatis ; labio externo declivo. 



Not so square in form as N. avellana, with the upper part of 

 the whorls more elevated, and the outer hp more sloping ; the 

 external surface is slightly plicated. On one specimen there are 

 one or two spines. 



Island of Luzon ; on the stony bed of a small river. Cuming. 



71. Neritina rugata (pi. cix. f. 3, 4), Recluz, Rev. Zool., 

 1842, p. 75. 



N. testa oblique subovali, nigra, tuberculatft ; spira celata, apici 

 obtusa ; apertura alba, oblique subovali ; labio externo rotundato, 

 superne declivo; labio interno, semilunari, subcomplanato, in 

 medio ad marginem crenulato et bidentato. 



Rather obliquely oval, black, tuberculated, with the spire con- 

 cealed ; aperture white, obliquely oval ; outer hp rounded, sloping 

 towards the spire ; inner lip rather flat, dentated and crenulated 

 at the edge. 



Island of Negroes ; in mountain streams. Cuming. 



72. Neritina celata (pi. cxv. f. 205), Recluz. 



N. testa N. interrupts simili, sed solidiore ; spira celata, an- 

 fractu viridi fasciato ; apertura cinerea. 



More solid than N. interrupta (Sp. 65), and differing from N. 

 bicolor (Sp. 66) in having the spire concealed by the last whorl, 

 which is striped with green. 



South Sea Islands. 



73. Neritina subpunctata (pi. cxv. f. 206), Recluz, Pro. 

 Zool. Soc, 1843, p. 199. 



"N. testa semiglobosa, olivaceo-fusca, tenuiter rugata; rugis 

 punctis nigrescentibus seriatis notatis ; sub epidermide alba, nigro 

 reticulata ; anfractu unico, supra medium anguloso ; apice perfo- 



