G6. Neritina BicoLOR (pi. cxv. f. 204), Reduz, Pro. Zool. 

 Soc, 1843, p. 200. 



N. testa N. interrupta siniili, sed solidiore, lineis continui?, 

 apertura alba, columella tuinida. 



No essential difference can be traced between this species and 

 N. interrupta, excepting that it is a more solid shell, and has the 

 columella tumid. The aperture is wliite, and the greenish lines 

 ai'e less distinct, and not interrupted. 



Island of Luzon ; on stones in a mountain stream. Cuming. 



67. Neritina squamosa (pi. cix. f. 26, 27), Reduz, ? 



N. testa oblique subquadrata, tuberculis trigonis luteis rugulata, 

 inter tubercula rubra griseo trifasciata ; spii-a exsertiuscula, anfrac- 

 tibus angulatis, superne subplanulatis ; apertura obliqua ; labio ex- 

 terno subrotundato ; columella alba, margine crenulato, in medio 

 dentibus magnis duobus obtusis. Operculo cinerascente. 



Obliquely quadrate, with triangular yellow tubercles, reddish, 

 with three blackish bands between the tubercles ; the whorls are 

 angulated, rather flat above the angles ; the columella has two 

 large, rather blunt teeth near the middle of the edge, with small 

 crenulations between them. 



Island of Negroes; on stones in a mountain stream. Cuming. 



68. Neritina circumvoluta (pi. cxv. f. 202, 203), Red. — ? 



N. testa globosa, sublaevigata, fulva, maculis minutis sparsa, 

 nigro trifasciata; spira parva, apice obtuso, anfractibus subrotun- 

 datis, ad suturam tumidis ; apertura obliqua, albida ; labio interno 

 subplanulato, superne calloso, ad marginem dentibus duobus ob- 

 tusis et crenulis minutis. Operculo nigro. 



Of a roundish form, with very little of the spire visible ; of a 

 light brownish colour sprinkled with white and blackish spots, 

 with three black bands, one at the suture, near which, when full- 

 grown, the whorl is swelled ; columella flattish, callous near the 

 sutiu-e, with two blunt teeth, and minute crenulations on the 

 margin. 



Island of Negroes ; on stones in a mountain stream. Cuming. 



69. Neritina avellana (pi. cix. f. 9, 10), Reduz, Rev. 

 Zool., 1842, p. 76. 



" N. testa subglobosa, crassiuscula, roseo-violacea, macuhs albis 

 anterius nigro marginatis, sagittatis, crebris, 3- seu 4-fasciata; 

 sutuia lactea, maculis nigris arcuatis alternis late cincta ; spira 



3 y2 



