IN EUROPE SOUTHERN GERMANY. 
17 
and Carnivora, by the circumvolutions of the brain. He is 
now preparing to publish a magnificent work, with plates, re- 
presenting particularly the brains of the Felidm, from which 
we may expect some important principles for future researches 
on the Animal Kingdom. 
At Vienna, Natterer having returned from a lengthened 
sojourn of sixteen years in Brazil, has brought with him, 
as is said, the largest collection of Brazilian Birds hitherto 
known, amounting to more than a thousand species ; and we 
cannot therefore be sufficiently urgent, that he will soon de- 
cide on making them known. Nor has he confined himself 
to collecting Ornithology only, since we frequently see re- 
markable animals of other classes published, which are said to 
be the fruit of his expedition. Among these I will merely 
mention the famous Lepidosiren, the description of which he 
entrusted to Fitzinger, who, as well as Bischoff* and others, 
believed it to be the last link of the Batrachians, although 
furnished with scales, whilst I, persuaded by the profound 
anatomical researches of Owen, do not hesitate to class it 
with Fishes. 
Fitzinger, from whom we expect researches of still greater 
interest, continues to issue detached memoirs, which are always 
of value, such as that on Crocodiles in the Annalen des Wiener 
Museums der Naturgeschiclite, a work which, I regret to say, 
is no longer published. In these Annals, the famous Heckel, 
the curator of the ichthyological portion of the Vienna Mu- 
seum, and the inventor of a very useful instrument, which he 
calls an Ichthyometer, for the measurement of fish (which being 
thus defined by certain formulae, may be drawn without seeing 
them), has published various memoirs, which emulate each 
other in merit. He sent me several new genera, accurately 
defined, that I might include them in my writings on fish ; and 
more recently, he has informed me of a new inhabitant of the 
fresh- waters of eastern Europe, which he calls Aulopyge, most 
remarkable for having the anal fin perforated, and also for its 
affinity to the Anableps of South America. 
17 
B 
