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skull, which have led him to give the name of Aetosaurus (or eagle-lizard) 
to the new genus which he establishes for its reception. The teeth, which 
are inserted in distinct sockets, have a cylindrical root and a compressed, 
somewhat lance-shaped crown; the central cavity is very wide in the 
cylindrical root, but gradually narrows towards the point of the crown, 
during its passage through which it gives off numerous branched canals 
towards the periphery of the tooth. Professor Fraas regards this tooth as 
more like that of Ptreodactylus or Rhamphorhynchus, than of a lizard or 
crocodile. The whole body is covered with bony plates, as is also the long 
tapering tail. The systematic position of this reptile is rather difficult to 
determine. The author sajs that the bones of the skull and those of the 
extremities point sometimes to one, sometimes to another type of reptiles, 
whilst at the same time the bird-type peeps forth in the four perforations of 
the cranium, the perforation of the lower jaw, and the sabre-shaped shoulder 
blade. He is of opinion that Aetosaurus is probably one of those Omitho- 
scelida with lacertilian characters, the occurrence of which has been antici- 
pated. 
Archceopteryx. — According to a statement in the u Zoologische Garten,’* 
a second specimen of Archceopteryx lithographica has lately been obtained 
from the quarries at Pappenheim, near Solenhofen, where the only other 
known example of this singular bird was discovered some twenty years ago. 
The new specimen is said to be much more perfect than the former one, and 
especially to have the head entire. 
Food of a Siberian Rhinoceros. — Dr. J. Schmalhausen has made a micro- 
scopical investigation of the fragments of food picked out of the cavities of 
the teeth of a Siberian Rhinoceros antiquitatis ( = tichorhinus ), preserved in 
the Museum at Irkutsk. He identified portions of grasses, and the small 
twigs of some woody plants, such as Finns picea , Abies , Larix , Betula 
Ephedra and Salix, and although he is not quite certain ab out the species, 
most of them closely resemble well-known plants still growing in high 
northern latitudes. This furnishes fresh support to the opinion, originally 
expressed by Brandt, that the rhinoceroses and other great pachyderms of 
Siberia actually lived at or close to the spots where their frozen bodies are 
now to be found. 
The Quaternary Fauna of Gibraltar. — After long investigation, Professor 
Busk has communicated to the Zoological Society the results at which he 
has arrived from the examination of a large series of mammalia, from the 
ossiferous breccia of the caves of Gibraltar. These remains belong to a far 
more ancient fauna than that described by Professor Busk in a former 
paper ; he refers them u in all probability to the early Pleistocene, if not 
Pliocene, epoch.” 
The following animals are recorded. A species of bear ( Ursus fossilis or 
arctos ), the spotted hysena (H. crocuta ), a leopard (Felis pardus ), a lynx 
(F. pardina), a cat (F. ealigata), the horse ( Equus cabullus ), a rhinoceros 
(R. hemitcechus ), two species of deer (one resembling the fallow deer, 
Cervus dama, the other probably Cerms elaphus ), an ibex ( Capra hispanica ), 
an ox (Bos primigenius ?), a wild pig (Sus scrofa ), hares and rabbits, and 
a molar of Elephas aniiquus. It is remarkable that no remains of the Gib- 
altar monkey (Macacus mans') occurred in these deposits. 
