426 Journal of the Asiatic Society of Bengal. [N.S., XIX, 
Corticula andersoniana Nevill. 
(Plate 16, Fig. 11). 
1877. Corbicula andersoniana, Nevill, op. cit , p. 41. 
1878. Corbicula andersoniana, Nevill, op. cit., p. 903. 
This interesting species was described by Nevill from 
specimens collected by Anderson near Moumein (Tengyueh). 
Yunnan, and is represented in the present collection by a good 
series from the same locality. 
The shells are of medium size, inaequilateral. somewhat 
tumid, ovate to subtrigonal in outline, some deeper than others; 
with a very regular sculpture consisting of fine, concentric 
striae. The hinge is arched, with the lateral teeth of the same 
size and minutely serrated; the nymphs are somewhat curved 
and nearly smooth. The periostracum is lemon-yellow,. and 
the nacre is olivaceous to purple on a shining white background. 
Measurements :—(in millimetres). 
Type 2 3 + 5 6 
Length - 19 1s 156 18 17 7 
Height ao io 136 8 36 134 10°4 
Diameter < 105 10 G2 104 161 76 
The type is No. 7172, Ind. Mu 
n 
decide about the various species described by Heude from 
various parts of China, but from his descriptions and figures if 
um inclined to consider his C. papyracea and ©. cantatoris, as 
being nearly allied to, if not identical with Nevill’s ©. 
andersoniana. 
Corbicula ferruginea Heude. 
(Plate 16, Fig. 12) 
1885. Corbicula ferruginea, Heude, op. cit., Plate VII, Fig. 38. 
C. ferruginea, belongs to the same group of species 48 
C. andersoniana, but the shell is much shorter, sub-evlinderical 
in shape; thinner, but with more pronounced sculpture, and 
has a comparatively stronger hinge. 
e€ species was originally described from the hill-streams 
Martini 
! Clessin, LS ‘Chineucis cad % Cc eldideen, p. 167, 
Plate XXIX, Figs. 15, 16. nee ee 
