548 
ZOOLOGICAL LITERATURE. 
NARICIDiE. 
Nainca delicata^ sp. n.. Pease, Am. Joum. Conch, iii. p. 282, pi. 23. fig. 25 
Paumotu Islands. 
Neritopsia mierliraia^ sp. n., Pease, /. c, pi. 23. fig. 26, Annaa Island, Poly- 
nesia, 
SCUTIBRANCHIATA. 
PODOPHTHALMA. 
Neritid^. 
Neritapolita (L.), Gidf of Tartary, 10-14 fathoms, one specimen. Schrenck, 
/. c, p. 380. 
Neritina mot'chiana (Dunker), Reis. Novar. Moll. pi. 2. fig. 24, Madras. 
Neritina peguensisy sp. n., Blanford, Journ. As. Soc. ii, p. 68, pi. 1. figs. 1- 
16. The type occurred close to the heach in a small stream which descends 
from the hills close to Cape Negrais j specimens were abundant in a brackish 
pool at the beach, spinous and spineless ones mixed together j a spineless 
variety in the salt-water of the Bassein river. N. depressa (Bens.) figured, 
ibid. figs. 17-19, crepidularia (Lam.), figs. 20-22, found upon Nipa palms j N. 
cornucopice (Bens.) = melanoatoma (Troschel), locally abundant in the delta of 
the Irawady, slightly differing from the Calcutta type. N. cornucopice and 
N. depressttf inhabiting the Ganges delta, are scarcely distinguishable from 
each other by any more important character than the colour of the aperture j 
the same shells in Pegu have varied so much that each differs from the other 
at least as much as it does from their congener N. creprididaria. In other 
places the race representing N. cornucopice may be perfectly undistinguishable 
from N, crepidularia y as appears to have been observed by Von Martens in 
Singapore.” [The Recorder has found specimens with red and others with 
blackish apertures in the same rivulet, and, not seeing any other difference 
between them, ho came to the conclusion that this difference of colour is not 
sufficient for specific distinction. Whether there are any other differences 
he is at present not prepared to state.] 
Neritina mauritiana, sp. n., Morelet, Journ. Couch, xv. p. 440, Mauritius. 
Neritina dispar y rudisy ruhiday and maculatay spp. nn.. Pease, Am. Joui'n. 
Conch, iii. pp. 285, 286, pi. 24. figs. 3-6, Roratonga, Ponape, and Tahiti. 
Neritina reclivata (Say) including (Shuttl.), ca/^onn'ca (Reeve), 
cassiculum (Sow.), picta (Sow.), showalteri (Lea), and jayana (R^cluz), are 
briefly described and figured by Binney, Land- and Freshwater Shells of 
N. Am. iii. pp. 103-107 ; radula of the first, p. 104. The name Neritella 
used by Binney in this paper has been cancelled by himself, as it cannot 
have priority, not being accompanied by a description. Journ. Conch, xv. 
p. 432. 
Navicella. Dr. Gray proposes to divide this most natural genus into three 
tribes (subfamilies) and four’ genera (CatilbiSy Pariay StenopomUy and Ortho- 
poma)y on account of differences observed in the shape of the [rudimentary] 
operculum. Tlie opercle of each genus is figured in a woodcut : 14 species 
of Catillusy 2 of Pariuy and 1 of Stenopoma are enumerated. The species 
belonging to Orthopoma are not yet pointed out. Proc. Zool. Soc. 1807, 
pp. 993-1000. 
