MAMMALIA. 
r>r 
PBOFESSOK ANDE. WAGNEE OF MUNICH. 
The difficulty of presenting a succinct review of the various 
works, in this department of Science, is every year increasing. 
North America, and the vast colonial empire of England, 
are daily assuming a more active participation in scientific 
research, and the mutual difficulty we experience of becoming 
completely conversant witli the labours of each other, in- 
creases the labour of uniting, in one category, their published 
works with our own."^ This difficulty becomes much greater, 
amounting sometimes even to impossibility, because the extra- 
European naturalists do not always employ our Terminology, 
though well adapted for accurate definition. A thorough 
acquaintance with “ Illiger's Prodromus Systematis Mam- 
malium et Avium additis terminis Zoographicis^'^ would be 
a great recommendation to them. 
Even within the province of our OAvn scientific culture, the 
difficulties are increased, of making ourselves master of zoo- 
logical literature in its whole extent. The diflerent dialects 
of the great empire in which the Teutonic tongue prevails, are 
* For example, we have not yet succeeded ui procuring, from Eng- 
land, after repeated attempts, the Calcutta Journal of Natural History ; 
so that a notice of that work must be deferred till next Report. 
47 
