518 



36. Neritina cornea (pi. cxi. f. 67, 70, 71), Linn., Syst. 

 Nat. xii. p. 1258. N. amphibia, Lesson, Voy. Coq. t. xi. 2me 

 part. N. ampullaria, Lesson. N. subsulcata, Sowerby, Conch. 

 111. f. 50. N. Morio, Lesliayes, in Lamarck. N. fasciata, Lam., 

 Anim. s. vert. viii. 



N. testa N. dubia simillima, sec! transverse subsulcata. 

 Differing from N. dubia in being sulcated. 

 Mr. Cuming took specimens from leaves of palms, twenty feet 

 high, in woods, at Puerto Galero, Island of Mindoro. 



37. Neritina serrulata (pi. cxiv. f. 164), Reclnz, in 

 Cuming' s Collection. 



N. testa N. dubia; simillima, sed labio columellari dentato ; 

 colore nigro, lineis et punctis albis. 



Eesembling N. dubia, but with the edge of the columella den- 

 tated. The colour is black, with white lines and spots. 



Cape Palmas, Sumatra ; on stones in a river. Cuming. 



38. Neritina apiata (pi. cxiv. f. 165), Reduz, MS. in Mus. 

 Cuming. 



N. testa, N. dubia simillima, sed spira magis producta ; columella 

 obscure crenulata. 



Like N. dubia (Sp. 35), but with the spire more produced, and 

 the columella very obscurely crenulated. 



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



39. Neritina piperina (pi. cxiv. f. 166, 167), Chemn., t, xi. 

 p. 173. pi. 197. f. 1905-6. 



N. testa transverse ovali, glabra, epidermide tenui, subviridi in- 

 duta, maculis trigonis nigris picta ; apertura magna, fulva ; labio 

 externo intus incrassato, superne oblique extenso ; labio interno in 

 medio subtumido, margine dentato. 



Transversely oval, shining, with a thin, greenish epidermis, and 

 large three-cornered black spots on the outside ; aperture large, 

 yellow ; outer lip extended at the upper part with an oblique 

 undulation; inner hp slightly swelled in the centre, dentated at 

 the edge. The elegant specimen of which we give a front view 

 is in Mr. Hanley's collection. 



Locality unknown. 



