390 Miscellanies. 
Niphon. Cuv. Lower jaw considerably longest. Cynichthys. Sw. 
Lucioperca. Cuv. ees atm eaey eyenitery Variola. Sw. 
The tables alone, prove that Mr. S. has studied ichthyology deep- 
ly, and the work should, therefore, be carefully studied by those who 
are interested in this branch of zoology. We object to Perca and 
Labraz being united, (as they are in the last table,) and think Lucio- 
perca and Perca cannot be placed in the same genus. The analogies, 
however, would reniain the same, were all the sub-genera elevated to 
genera. S. S. H. 
16. Natural History of the fresh water fish of Central Europe ; 
by Louis Acassiz: plates, folio, 1839, Neuchatel.* 
The first livraison of this long promised work has at length reach- 
ed us from its accomplished author. The beauty of the Poissons 
Fossiles led us to high expectations of this performance, and we are 
most happy to find that they were not vain. 
The genera Salmo and Thymallus form the subject of this first di- 
vision, to the illustration of which twenty-seven plates are devoted, 
giving each species from three to five plates. Thus Salmo Fario is 
represented in five different plates, showing the difference of age, 
sex, and locality, and presenting the fish as seen from above, on the 
side, and in a transverse section, taken before the ventral or dorsal 
fins ; also the structure of the scales much. magnified, and the posi- 
tion and anatomy of the fins. The descriptions are in French, Ger- 
man, and English, which arrangement must be of great service to the 
work, as well as to ichthyologists of different nations, who might not 
all be equally satisfied, if one language alone was used. The present 
livraison contains only the first division of the genera named above, 
and is to be soon followed by another, which will complete this monog- 
raphy; and then each succeeding livraison is to finish, as far as prac- 
ticable, the monography of the genus of which it treats. 
The first volume of text, which includes the natural history and 
anatomy of the Salmonidae, will appear with the second livraison of 
plates, which will include the species of the genus Coregon, and the 
anatomical details relative to this family. 
The following is a list of the species figured in the present livrai- 
son: 1. Salmo salar, L., four plates, three of them colored. 2 S. 
Fario, L., five plates, four colored. 3. S. Trutta, L., four plates, 
three colored. 4. S. Umbla, L., four plates, three colored. 5. S. 
z nO,  L., three plates, two waded: 6. S. lacustris, L., three 
re Natu des Poissons d’Eau douce de Europe Centrale, par L. Agas- 
e - Neuchatel ane aux x frais de l’Auteur, 1839. 
eas 
