274 Voyage aux Indes Orientales. 
and of the immature young somewhat similar to what he has re- 
presented. 
Reptiles, par Rene-Primevere Lesson. This portion of the work is 
confined to the mere descriptions of thirty-three species, seven of 
which are figured. One or two new genera and families are pro- 
posed, but the characters are so slightly and shortly given, that it is 
not necessary to notice them. And Telraonyx, Mr Gray remarks, ap- 
pears to be formed from an imperfect specimen of a young Emys. 
The same gentleman considers Emys Belangerii as identical with 
E. trijuga; E. flavonigra as E. thuga; and E. trigibbosa as E. 
tecta. 
Poissons, par A. Valenciennes. Commences by a few short preli- 
minary observations. Upon the coast of Malabar, to judge from the 
collection of Belanger, and the fishes also procured by Dussumier, 
the family of the Scienoides among the Acanthropterygii, and of the 
Clupeadee among the Malacopterygii are the most numerous. At 
the same time the absence of many jugular fishes is particularly 
remarkable upon a generally sandy shore*; and the Apodes also 
seem few in number. The fresh waters possess some curious 
forms, particularly of the Cyprinoides, of which M. Belanger col- 
lected a considerable number, but in the river fishes he has been 
in a great measure anticipated by the work of Hamilton Bu- 
chanan, although that author is not perhaps always correct in the 
generic situation of his species. Eighteen species are in all de- 
scribed, of which ten are figured. Pterois is a curiously formed genus, 
and the members of it ascend the fresh waters periodically like the 
Salmonidse. They also appear to undergo a seasonal change of co- 
lour. The abode in the fresh water is, however, so detrimental, 
that they become weak, and are even carried down the stream upon 
their sides, while after a sojourn in the salt water, their active habits 
and brilliant silvery tints are speedily recovered. M. Valenciennes 
asks what is the cause of this, and remarks, te that we cannot be- 
lieve that the act of spawning is the only cause of the disease of 
those fishes, for it is certain thai many species of salmon periodical- 
ly enter the river, and do not every time spawn. (Car il est incontes- 
table, que plusieurs especes de saumon entrent periodiquement dans 
les rivieres, et qu'elles n'y fraient pas chaque fois.) A fact stated 
so, by an ichthyologist of such celebrity, must have some weight. We 
are not aware that it is a common fact, or a fact at all, that any 
of the salmon periodically enter rivers and return without spawning ; 
but as he promises to dilate upon these and other points when treat- 
ing of the Salmonidse in the Histoire Naturelle des Poissons, now de- 
