344 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 8, 



and Von Meyer), Aceratherium incisivum, Acerather.\Goldfussi, Di- 

 notherium yiganteum, Lophiochoerus Blainvillii, a species of Tapir, 

 Palceomeryx and other Ruminants, &e., with several species of 

 Chelonians. 



M, {TetraJophodon) longirostris occurs abundantly in the sands 

 of Eppelsheim, associated with Dinotherium giganteum, Chalico- 

 therium Goldfiissi, Rhinoceros Schleiermacheri^ Aceratherium inci- 

 sivum, Acerath. Goldfussi, Macrotheriiim giganteum, Hippothe- 

 rium gracile, and species of JDorcatherium, Machairodus, Amphi- 

 cyon^ &c. 



The agreement in so many remarkable generic and specific mam- 

 malian forms leaves little room for doubt that the Eppelsheim sands 

 and the lacustrine deposits of the Garonne and other parts of France 

 are of the same Miocene age. But there are some notable pecu- 

 liarities in the Eppelsheim fauna. No well-marked specimen, so 

 far as I am aware, of M. {Tetralophodoii) longirostris, as here de- 

 fined, has hitherto been met with beyond the limited area of the 

 Eppelsheim sands, and probably the valley of the Danube ; nor has 

 either M. {Trilophodon) angustidens or M. (Triloph.) tapir oides — 

 which usually go together — been discovered within it. It is very 

 improbable that the range of this species should have been confined 

 to a small district in the valley of the Rhine ; but the fact is un- 

 doubted, that it occurs there in great abundance, and has either not 

 yet been found, or is very rare, elsewhere. The only exception out 

 of Germany, with which I am acquainted, is a specimen of unknown 

 origin in the Museum of the Faculty of Sciences at Toulouse, which, 

 on the indication of M. Lartet, I was enabled to examine by the 

 kindness of M. Leymerie. It consists of an upper right maxillary 

 containing the penultimate and last molars in situ. They present 

 all the characters of M. {Tetralophodon^ longirostris, as distinguished 

 from M. {Tetraloph.^ angustidens. M. Leymerie informed me 

 that the specimen is supposed to have been found either in Gas- 

 cony or Languedoc, but that there was no record of the exact loca- 

 lity. It is not improbable that another exception is formed by the 

 specimens mentioned by Cuvier (Oss. Foss. additions, 4to edit. tom. 

 iii. p. 318) as having been discovered by M. Lourteau at Sairac in 

 the Subpyrenees. Two of the molars are described as having the 

 Tetralophodon-character of four ridges ; but, no figures having been 

 given, the details are not sufiiciently precise or exact to admit of any 

 decided opinion upon the subject. 



A satisfactory geological limitation of the Eppelsheim deposit and 

 its organic contents is attended with some difficulty. The loose in- 

 coherent sand of which it is composed is spread out horizontally 

 like the Loss, and the margin thins out to spread over a portion of 

 the " Lower Miocene " Mayence Basin ; so that where the beds are 

 in contact the fossil remains of the two are liable to be confounded. 

 But in all its leading features the Mammalian Fauna of Eppelsheim 

 resembles that of the Falunian deposits of France and Switzerland. 



I shall now consiijer the relations of the Pliocene fauna in which 



