521 



47. Neritina Cassiculum (pi. cxv. f. 194), Sowerby, Conch. 

 Illust. f. 55. 



N. testa subglobosa, epidermide viridi induta, maculis insequa- 

 libus, nigro-lineatis, obscure triserialis ; sub epidermide variegata ; 

 spira obtusa, anfractibus subrotundatis quatuor ; apertura semi- 

 circulari ; labio externo superne declivo, margine crassiusculo ; 

 labio interno aurantio, subtumido, margine minute denticulate. 



Of a globose form, slightly inclining to oval, with an olive- 

 green epidermis, under which may be seen numerous black bnes, 

 angulated so as to leave white, triangular spots, which are larger 

 in three bands across the shell ; spire obtuse, consisting of four 

 whorls ; aperture semicircular, with the outer lip slightly thick- 

 ened, and the columella inclining to orange, narrow, swelled, and 

 minutely crenulated on its nearly straight edge. 



Locality unknown. 



48. Neritina triserialis (pi. cxv. f. 195, 196), Sowerby, 

 junr., Conch. 111. f. 60 ? 



N. testa subquadrata, cinerea, maculis albis nigro marginatis, 

 prascipue seriebus tribus variegata; spira. planiuscula, anfractibus 

 angulatis ; apertura alba ; labio externo subexpanso, superne angu- 

 lato ; columella semilunari, subcomplanata, minute crenulata dente 

 unico obtuso. 



Rather square, flattish in front, grey, with black- edged white 

 spots, so arranged as to form three bands lighter than the rest of 

 the shell; spire rather flat; whorls angulated above; aperture 

 wide; columella dentated. 



Locality unknown. 



49. Neritina tritonensis (pi. cxv. f. 197, 198), Le 

 Guillon, Eev. Zool., 1841, p. 345. N. Dringii, Bechz, MS. 



N. testa oblique ovali, glabra, viridi vel rubescente, fasciis et 

 punctis luteis varie picta ; spira parva, anfractibus decbvis tribus ; 

 apertura cinerea ; labio externo ad spiram declivo ; columella cre- 

 nulata et bidentata. 



More oval longitudinally than N. Sowerbii, with the outer lip 

 more sloped at the upper part. Of the smaller specimens named 

 N. Dringii, in Mr. Cuming^s collection, by M. Eecluz, one is 

 transversely banded, and another longitudinally striped. 



New Ireland, R. B. Hinds, Esq., B.K Var. K Dringii, 

 Hanover Bay, North Austraba, by /. E. Dring, Esq., R.N. 



