199 
Remarks. —It is rare to meet with an Anodonta of the thickness of 
this species, hut it still is not so ponderous as the arcuata, Per., or as 
lato-marginata (Nobis). It cannot be confounded with either of these 
species, not being arcuate, and not haring compressed beaks like 
the former, and being oblong and thinner than the latter, as well as 
also being destitute of the broad margin. The substance of the shell 
is slightly thickened anteriorly, and the basal margin is emarginate ; 
the beaks are submedial, and when perfect are beautifully ornate 
with numerous small folds which form an acute angle from the point 
of the beaks, nearly parallel to the line of the umbonal slope; the 
ligament is short and rather thick ; anterior cicatrices distinct; dorsal 
cicatrices large, and placed in the cavity of the beaks. The colour of 
a single young specimen before me is salmon inclining to purple, and 
the adults have the cavity of the beaks tinted in this manner. In the 
young specimen the lamellar line on the dorsal margin is very well 
defined, in the adults this character is nearly obliterated. 
V 
Anodonta Ctjmingii. A. testa ellipticd , compressa, incequitate- 
rail; valvulis subcrassis; natibus vixprominentibus; epidermide 
atro-fuscd; margaritd alba et iridescente. 
Hab. Malacca. 
Diam. 1 ; length T9 ; breadth 3 inches. 
Remarks. —This is an interesting species, and remarkable in the 
form of the dorsal line, which is thickened and raised immediately 
under the beak, where it is slightly incurved. This disposition to 
form a curve tooth reminds us of that group of Naiades which M. 
D’Orbigny discovered in the rivers of South America, and which 
comprise his genus J lonocondylcea. In fact, this species forms a 
perfect link between the Anodontce and his genus, and it is allied very 
closely to that species of this group which I described in the c Trans*, 
of the Am. Phil. Soe.’ vol. viii. pi. 18. fig. 39, under the name of 
Margaratina Vonderbuschiana , from Java. The form of the tooth 
of the M. Bonellii also approaches to these. The anterior margin of 
the Cumingii is rounded, the posterior is somewhat biangular ; the 
anterior cicatrices confluent; the dorsal cicatrices form a line across 
the cavity of the beaks. In all the four specimens under examination, 
the beaks are too much eroded to observe any undulations. An un¬ 
usually dark line marks the course of the pallial impression. 
4. Note on Tragelaphgs Angasii. By Mr. Progdfoot. 
The skins which I exhibit to the Society are those of an old ram 
and of a young female Antelope, which I shot on the banks of the 
Mapoota River, about sixty miles above its embouchure into Delagoa 
Bay. This river flows through the country of Mankazana, king of 
the Mathlengas (or Outfaces), which people call this animal Inyala. 
It is also found on another river called Umcoozi, running into 
St. Lucie Bay in the territory of Umpanda, king of the Zoolu, but 
very rarely. 
On the Mapoota the Inyala are more numerous, and occur in small 
troops, composed of one ram and four or five females with their young. 
