525 



59. Neritina obscurata (pi. cix. f. 28, 29), Recluz, Rev. 

 Zool., 1842, p. 183. 



N. testa N. corona simili, sed crassiore ; epidermide crassa, 

 nigra vel fusca nigro bifasciata ; labio externo ad suturam magis 

 elevato, plicis longitudinalibus magis regularibus et distantibus. 



A more solid and smooth shell than N. corona (Sp. 55), with the 

 outer Hp more turned up towards the suture, and the plicse more 

 regular, distant, and smooth. 



Mindinao, Philippines. Cuming. 



60. Neritina Souleyetana (pi. ex. f. 59, 60), Recluz, Rev. 

 Zool., 1842, p. 182. 



"N. testa ventricoso-globosa, tenuiter striata, nitida, nigra, 

 lineis longitudinabbus, ssepiusundulatis,ornata; anfractibus tribus, 

 ultimo superne spinis maculatis instructo ; spira prominula ; apice 

 decorticato ; apertura, rotundata, basi vix dilatata, navicante ; labio 

 angusto, piano, medio concavo, superne calloso, antice subrecto, 

 unidentato et obsolete ruguloso." 



I copy the description by Recluz, because the only specimen I 

 have seen is young, and has but one spine. Although the shell 

 seems to combine many characters of other spinose species, it does 

 not seem exactly Uke any one of them. 



From the Marquesas. 



61. Neritina Bengalensis (pi. cix. f. 30, 31), Chemn., xi. 

 pi. 197. f. 1911? 



N. testa, globosa, ponderosa, lsevi, epidermide fusca induta, 

 maculis pallidis picta ; spira subplanulata, pasne obtecta, anfractu 

 ultimo ad suturam nigro fasciato, superne angulato, ad anguliun 

 plerumquebrevispinoso; in medio ventricoso; labio externo superne 

 angulato, labio interno superne calloso, inferne subplanulato ; 

 margine dentibus in medio quinque parvis, uno crasso obtuso, 

 deinde superne tribus parvis obtusis. 



This species differs from others of the spinose section in having 

 the spire nearly hidden, and being ventricose in the middle of the 

 whorls. The angle is sometimes coronated with distant black 

 spines. The shell is smooth, with large pale spots on a greenish 

 ground, showing through a brownish epidermis. 



Bengal. 



62. Neritina Diadema (pi. ex. f. 41, 42), Recluz, Revue 

 Zoologique, 1841, p. 277. 



N. testa N. coronce simili, sed laevigata. 



3 Y 



