404 INDIAN CYPRINIDZ. Sarcoborine. 
responding tendency to carnivorous habits; its food being, according to Mr. 
Yarrell, “ worms, molluscous animals, and insects, with some vegetable matter.” 
Leuciscus alburnus, another European species, the dorsal of which is placed 
opposite to the commencement of a large anal, possesses a blind appetite for 
insects to such a degree as to render it an excellent amusement for young 
fly-fishers, and the activity of this species in seizing insects is the poetical 
theme of all field naturalists. 'This species may also, as well as Cyprinus 
cultratus, Lin., be referred either to the Perilamps or to the Opsarions; but 
this question I leave to be determined by the naturalists of Kurope, where 
these species are found. 
The position of the dorsal and size of the anal therefore become natural 
characters, and appear sufficient to enable us to discriminate clearly between 
the Leucises and the adjoining groups. 
For the right application of these characters, it is necessary to state that we 
must regard those cases in which the first ray of one fin is opposite to the last 
ray of the other, and vice versa, as opposite fins ; and thus we shall very rarely 
have occasion to remark the position of the dorsal as opposite to the interval 
between the ventrals and anal, without being more or less opposite to one or 
other of the latter fins. When such a case happens, the species must be re- 
garded as a Leucise if the anal be small, and either Opsarion or Perilamp if 
the anal be large. 
Cyprinus daniconius has the form of a Leucise, with the markings of a 
Perilamp on the sides. In Buchanan’s collection there is a figure of another 
variety which I have not met with, Anjana of the natives, P. G. 328, which 
in the synopsis I have placed with the Leucises under the name of L. lateralis, 
but which we might have equal reasons for placing with the Perilamps. It 
has in fact the mouth and lateral streaks of the latter genus, with the general 
form and fins of a Leucisc, so that it would be just as accurate to place it in one 
genus as in the other. In size and general form it corresponds precisely with 
Cyprinus daniconius, but differs from it in having the head more compressed, 
