2 G. and H. Nevill — Descriptions of new Mollusca. [No. 1, 



nal de Conchiliologie for 1862, p. 232. Finally we have figured, 

 and made a few further notes on two new species lately described 

 by us in the Ceylon Asiatic Society's Proceedings. 



G-lauconella Andersoni, n. sp., PL I. Fig. 13, 13a, 13b. 



T. ovalis, giauca, aperta, indistincte longitudinaliter striata ; 

 spira paululum involuta ; labio appendiculo minimo munito ; aper- 

 tura ampla, antice dilatata, margine antico ovaliter arcuato, postico 

 sub-coar^tato. Long. 8%, Diam, maj. 6 J, Alt. 3^ m.m. 



This interesting species in shape closely resembles G. viridis, 

 Pang., the body of the shell is, however, considerably more in- 

 volute and the colour a pale apple green ; it also differs from the 

 above, as well as from all the other described species of the genus, 

 in the small, almost rudimentary, appendage. It is tolerably 

 abundant on reefs at low water in the S. Province, Ceylon. Dr. 

 Stoliczka also found it at Penang. The animal is dull greenish, 

 mottled with brown, the eyes are sessile, very small and black ; 

 the shell is completely hidden by the meeting of the lateral expan- 

 sions of the mantle, in this respect differing from G. viridis, in 

 which, according to A. Adams, the shell is only partially hidden. 

 Its mode of progression, at the time, strongly reminded one of us 

 of that of Omphalotropis. 



Cylichna lactuca, n. sp., PI. I. Fig. 2, 2a. 



T. anguste cylindrica, solida, laevis, nitida, alba ; anfractibus tri- 

 bus, ad suturam canaliculars ; spira, brevissima, paululum exserta, 

 nucleo mammillato, ultimo anfractu ad medium paulo constricto, 

 apertura supra angusta, lineari, ad suturam incisa, infra modice 

 dilatata ac sub-rotundata ; labro acuto, ad medium paululum pro- 

 ducto, labio levissime convexiusculo, paulo incrassato ; columella 

 plica, unica, valida, per-obliqua instructa. Long. 8£, Diam. 4^- 

 m.m. S. Province, Ceylon. 



This milky-white little shell appears to be nearest allied to 

 Cylichna voluta, Quoy. It also closely resembles the following, the 

 body whorl, however, is a little more contracted in the centre, and 

 instead of descending somewhat rapidly, it completely folds round 

 the upper whorls ; the apex is distinctly mammillated and the outer 

 lip is not so contracted anteriorly. It also seems to be much rarer. 



