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 Tetralojyho- 

 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 jMonograph,t assigns to this 

 species the name of Mastodon {^Tdralopliodon) 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 7nastodon found in the Leitha 

 limestone was found in 1816, 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 dental 

 structure, to the group of Trilo-phodontes. 



According to the author, like differences hold good with the several 

 species of Rhinoceros from these localities. 



On some Erratic Plvmoiiiena in Hungary. By Professor E. Suess. 

 Read before the Imperial Geological Institute of Vienna^ July, 1858. 

 Communicated hy Count Marsciiall. 



Erratic phenomena on the west side of the Rosalia Mountain- 

 group (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 loivalve referable to the family of the Zticince. 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. 



* Beitriige zur niihern Kenntniss der urweltlichen Saus-thiere, vol. iii. 1857, 

 PI. 11. fig. 3. ^ 

 t Quart. Journ. Geol. Soc, vol. xiii. p. 307. 



