Molhtsca. 59' 



Jlal. — Found on mossy trunks of trees in the upper part of the 

 island (J. J". Lister) ; north coast (Andrews). 



The t3-pc of L. mouhoti was described from Camboja, and differs 

 slightly in being a ti'ifle more elevated than the specimens from 

 Christmas Island. Its peristome also is slightly broader. At 

 present 1 have seen only two specimens, so am unable to judge 

 of the constancy of these differences. 



Family TRUXCATELLID^. 



13. Truncatella valida, Pfeiffer. (PL YIII, Figs. 21, 22.) 



Truncatella valida, Pfeiffer, Mon. Auric, p. 184; Kiister, Conch. -Cab., p. 11,- 

 pl. ii, figs. 19-21, 23. 



Jlab. — Philippine Islands, New Caledonia, Samoa, etc. 



The two or three apical volutions, constituting the protoconch, 

 are very convex, and although apparently smooth under a simple 

 lens, under the microscope are seen to be very finely, regularly, 

 longitudinally striated. 



Family ASSI3IINEID^. 



14 Assiminea andrewsiana, n.sp. (PI. VIII, Fig. 23.) 



Testa elongata, conica, imperforata, rufescenti - cornea, vix 

 pellucida ; anfractus 7, convexiusculi, lente accrescentes, infra 

 suturam linea pellucida marginati, lasves, nitentes, ultimus brevis, 

 rotundatus ; apertura obliqua, inverse auriformis, longit. totius 

 -g- fere adnequans ; peristoma marginibus callo tenui junctis, externo 

 acuto, tenue, columellari valde incrassato et reflexo. Long. 4, 

 diam. 2^ mm. 



Only a single specimen was obtained of this pretty little species. 

 It is closely allied to A. wuodmasoniana, Nevill,^ from Port Canning, 

 near Calcutta. It is similar in colour, but has more convex 

 whorls, and wants the keel which surrounds the umbilical region, 

 also a fine thread-like line which winds up the spire round the 

 middle of the whorls. This character, present in all four specimens 

 of A. ivoochna^oniana obtained by the Museum from Dr. Hungerford's 

 collection, is not noticed in Mr. jS^evill's description. 



1 Jouni. As. Soc. Bengal, 1880, vol. xlix, pt. 2, p. 163; 18S1, vol. l, p. InS,. 

 pi. vii, fig. 1. 



