288 
THK GEOLOGIST. 
the large tusk from the upper jaw, found at Belvedere in 1827, and 
described by Dr. Fitzinger, under the same denomination, and lately 
by Professor Kaup,* who had received a sketch of it from Professor 
Suess, as M. Arvernensis), must all be placed in the group of Tetraloylv)- 
dontes. A lower jaw from Belvedere, in Professor Leydolt's possession, 
having on each side a rather long tusk, with straight longitudinal 
flutings, may have belonged to a male individual, while the other 
specimens, above enumerated, may have belonged to females. Professor 
Suess, in accordance with Dr. Falconer's j\ronograph,t assigns to this 
species the name of Mastodon {TdraJophodon) longirostris (although 
retracted by Professor Kaup himself), reserving the specific name M. 
Arvernensis for the species with alternating, not opposite, dental pro- 
tuberances. 
The only known specimen of a mastodon found in the Leitha 
limestone was found in 181G, near Loretto, and is preserved in the 
Imperial Museum of Vienna. It is a ramus of the lower jaw from 
a young individual. It is essentially different from all the remains 
found in the sands of Belvedere, and belongs, on account of its dentul 
structure, to the group of TrilophoJontes. 
According to the author, like differences hold good with the several 
species of Rhhioceros from these localities. 
On some Erratic Phenojiiena in Hun</ary. By Professor E. Suess. 
Read before the Imperial Geological Institute of Vienna, July, 1858. 
Communicated by Count Marscjiall. 
Erratic phenomena on the west side of the Eosalia Mountain- 
gi'oup (between Lower Austria and Hungary) were made known some 
years since by MM. de Morlot and Czjzek. Similar phenomena have 
recently been traced out by Prof. Suess on the eastern or Hungarian 
slope, in the Batterer ravine near Marz. A deposit of irregular and 
rounded fragments, derived from the neighbouring mountains 
(Schneeberg, Wechsel, and Neuewelt), lies, several fathoms thick, 
beneath the loess. The calcareous fragments exhibit distinct ice- 
groovings, and some show the chain-like perforations made by the 
Voia ; and there are shells of an oyster (very like Ostrea edulis) fixed 
on the blocks and directly upon the glacial grooves. The intercalated 
sandy beds contain fragments of a Nucula or Yoldia, and internal casts 
of a bivalve referable to the family of the Lucince. From these facts 
the author infers that this portion of the Vienna Basin, after having 
gradually passed, during the neogene (younger tertiary) period, from 
the condition of a marine bay into that of a fresh-water lake, again 
underwent an irruption of the sea. 
* Beiti-age zur iialiem Kenntniss der urweltlichen SiLugthiere, vol. iii. 1857, 
PI. II. fig. ,3. 
t Quart. Jouni. Geol. Soc, vol. xiii. p. 307. 
