Naibleletaeren yb ei ie OuNe VAC MUA ths COs he eve ON 
OF ;MARINE MOLLUSCA DREDGED -IN 
SHALLOW; WATER IN--EHB 
ANDAMAN ISLANDS. 
By-D. Be PRESTON. F.Z.S. 
In dealing with the present small collection the exceedingly 
rich nature of the Andaman Islands Molluscan fauna is once 
more emphasized, several large collections, notably those of Nevill, 
Bouley, Wilmer and Warneford, made during more or less recent 
years having seemingly failed to exhaust it and there is little 
doubt that were systematic dredging, especially in from two to 
twenty fathoms, carried on at every available point round the 
islands large numbers of forms hitherto unknown to science would 
be revealed. 
In the present paper the author is able to diagnose and 
figure seventeen species which appear to have up to now escaped 
notice, and also to place on record the occurrence of several 
quite unlooked for forms, thus very considerably extending their 
known range, while the material collected has, in addition, enabled 
him to provide drawings of two species (Ethalia capillata, Gould 
and Eulima oxytata, Watson) which, though duly described, have 
not before been figured. 
Class GASTROPODA. 
Order PROSOBRA NCHIA. 
Family PLEUROTOMIDAE. 
Pleurotoma fusca, Hombron and Jacquinot. 
Voy. Sud. Pole, Zool., Vol. V, p. 111, pl. xxv, figs. 19-20. 
Brigade Creek, in 2-5 fathoms, on a bottom composed of de- 
caying vegetation ; Port Blair. 
Mangilia gracilenta, Reeve. 
Proc. Zool. Soc., 1843, p. 184; Tryon, Man. Conch., Vo!. VI, p. 251, pl. 
xxiii, figs. 98, 88; pl. xvii, fig. I1. 
Port Blair. 
