522 



50. Neritina Sandalina (pi. cxv. f. 199), Recluz, Eev. 

 ZooL, 1842, p. 76. 



" N. testa semiglobosa, interdum subovata, subsutura compresso- 

 strangulata, fusco-nigra tenuiter striata; apice convexo-obtuso ; 

 apertura albido-lutescente ; labio piano, margine vix arcuato et 

 obsolete denticulato ; labro patulo, superne depresso, linea nigra 

 marginato.^' 



Of a semiglobose form, with the whorls rather depressed near 

 the suture ; the aperture wide, with the upper part of the outer 

 lip extended towards the spire; inner lip very slightly curved 

 and obsoletely dentated. 



Sandal Bay ; on stones in mountain streams. 



51. Neritina Perrotettiana (pi. cxv. f. 200, 201), Recluz, 

 Rev. Zool., 1841, p. 337. 



''N. testa ovata, semiglobosa, fusco-nigricante, tenuissirae 

 striata; anfractibus tribus, ultimo superne coarctato; spira brevi, 

 convexa, obtusata ; labio piano, albido, in medio vix arcuato ob- 

 soleteque crenato." 



A small, black, semiglobose shell, with the spire nearly hidden ; 

 the aperture blueish, with a semicircular, flat, huffish columella. 



" Sur les Monts Nielgherries, la cote de Malabar ; " Recluz. 

 Ceylon; Dr. Grayham. 



52. Neritina longispina (pi. ex. f. 62, 63), Rechiz, Rev. 

 Zoologique, 1841, p. 312. N. corona, Lamarck, Anim. s. vert., 

 Non Linnaeus. 



N. testa oblique ovali, Isevi, epidermide nigra induta, obscure 

 nigro fasciata, spinis elongatis, nigris, recurvis coronata ; apertura 

 magna, margine postice prominente, ad suturara subcanaliculato ; 

 labio interno plana, aurantia, margine Isevi, in medio emarginato ; 

 spira brevissima, anfractibus parvis, compressis, paucis, ultima 

 maxima postice versus suturam subrotundata. 



This common species, which is named in most cabinets N. 

 corona, Linn., on the authority of Lamarck, does not in reality 

 agree with the figures quoted by Linn feus, nor with the shells in 

 his collection. It is large, obliquely oval, with a dark blackish 

 brown epidermis, through which black bands are seen. The spines 

 are long, and turned backwards. The aperture is large, the inner 

 lip septiform and orange-coloured, without teeth. 



On stones in small streams ; Island of Rodriguez. R. B. Hinds. 



