Cyprinus prop. INDIAN CYPRINIDZ. 347 
admit of no independent motion in the upper jaw, as in the European Carp, 
and most of our Indian Barbels. The pre-operculum is short, and forms, in 
conjunction with the anterior extremity of the inter-operculum, a convex arti- 
culating surface for the respective branch of the lower jaw, which proceeds 
almost transversely to meet that of the opposite side, giving the profile a short- 
ened character. The sub-operculum is very small, as well as the branchial rays, 
which in this, as well as in Catastomus dyocheilus, and some of our Indian 
Gudgeons, and most of the Gonorhynchi, can only be seen on removing the 
integuments. 
The stomach is a simple but lengthened sac, terminating in a very long 
narrow intestine; the abdomen contains an abundant supply of soft fat, in 
which the intestines seem to float. 
This species, which is reckoned the most delicious in Assam, is found only 
in the upper parts of the province, here the currents become clear, and 
somewhat rapid. It is common at Suddyah, and is said to be found from 
thence to the foot of the mountains. Its usual size is from twelve to twenty 
inches in length, and from four to seven inches deep from below the pectorals 
to the shoulders. It contains few bones, and is rich, fine flavoured, and whole- 
some, and for these reasons always sells at a higher price than ordinary fishes. 
It is one which might be introduced with great advantage to hilly countries, 
especially to places in India selected as sanataria, where its superior qualities 
would soon render it a favourite dish, and the place perhaps a favourite resort 
to others as well as invalids. 
The most suitable vivarium for this species might be formed by stopping 
up a clear mountain stream to a certain depth, and filling the irregularities of 
the bottom with sand, gravel, and stones; there should be a current in the 
water, and to prevent the escape of the fish, a grating should be fixed below ; 
and at the opposite end a stronger grating, if necessary, to prevent the intro- 
duction of rubbish during floods, as well as the escape of the fish, should the 
fall not be sufficient for the latter purpose. Barbus diliciosus is another 
