CAEASSrUS. 
We arrange as m a separate genus those species which have the 
general characters of Oyprinus, as defined by Cuvier, with an extended 
dorsal fin and short anal; but the mouth without barbs, and not having 
a firm denticulated ray to the dorsal and anal fins. Some appearance 
ot such a toothed ray may be perceived in one or two of these species, 
but so obscurely as to be scarcely discernible. 
CRUCIAN. 
Oarassius, 
Cyprinns oarassius, 
<( 
Willoughby; p. 269, pi. Q. 6; but he does not 
distinguish it from some other species, as 
Albivrnus and Ballerus. 
LiNNiEUs. Cuvier. Bloch; pi. 11. 
Jentns; Manual, p. 403. 
Tarrell; British Fishes, vol. i, p. 365. 
So little was formerly known of this fish that Gesner says he 
could not find it had been mentioned by any writer before 
Duhravius, and much uncertainty still rests upon it when 
considered as a British fish; for although Pennant mentions a 
fish of this name as known to himself, it is supposed to have 
been by mistake for the Prussian Carp; and Mr. Yarrell had 
obtained it in a few instances from the Thames; yet this is 
consistent with the belief that the species was at first introduced 
among us, and that even at a recent date. This indeed is 
asserted or implied in the experiments of which it was the 
subject; and of which an account is given in our history of the 
Carp. In what is there referred to the examples had been 
procured from Hamburg, where the fish appears to have been 
well known; for Linnseus refers to the Acts or Transactions of 
the University of Upsal, where it is called by the elder 
Gionomus Cyprinus Hamburger, as characteristic of the place 
where chietiy it was found. 
