10 
STATE or ZOOLOGY 
kinds of bird-lime, the new nets and the new cages, which they 
have invented and constructed. The present Namnann, after 
collecting and sifting the knowledge of his predecessors, and 
perfecting it by means of the growing light of the age, is now 
completing the last volume of a work, which excels all others 
of tlie same class, no less in the completeness of the text, than 
in the accnracy of the plates. 
Proceeding to visit Northern Germany, we meet with Messrs. 
Blasius and Keyserling, who after having employed themselves 
on a Monograph of the European Vespertilionidce, have un- 
dertaken to give a descriptive Catalogue of the Vertehrata of 
that portion of the world, a most useful task indeed, hut of 
which I will not now speak in detail, as the questions on which 
I differ from those authors will be sufficiently elucidated when 
my work on the same subject is published. The descriptions 
of the Mammalia and Birds are already issued, and those of the 
Eeptiles and Fish are anxiously expected. In Frankfort on the 
Main, Dr. Btippell, now deserted by Professor Cretzschmaer, 
who seems to have bidden farewell to our science, has com- 
pleted the ample volume of his Fauna von Ahyssinien. We 
have also, from the same author several monographs, one on 
Cehlepyris, another on the Swans (among which he enumerates, 
to my surprise, the Cairina moschata), and he promises to 
publish others. 
Southern Germany beholds new works published daily, but 
not of such importance, since the deaths of Spix, Wagler, and 
Michahelles. The supplements to the work of Schreibers on 
Mammifers are still continued. Besides the great work pub- 
lished at Darmstadt, I have received a periodical publication 
on the Birds of Europe, by Susemilh, which will now acquire 
fame, from the care bestowed on it by the celebrated Schlegel. 
There is also a treatise by F. Berge, on the Propagation of 
Birds, containing figures of their eggs. Some articles on 
Zoology occur in the Journal of Dr. Bohatzsch, published at 
Munich. The celebrated Tiedemann, by studying daily the 
brains of animals, and by weighing, measuring, and analysing 
them in every way, has succeeded in distinguishing the species 
even when closely allied, more especially of the Quadrumana 
' 16 
