LAND ANIMALS. 107 



jaws of a dolphin (Delphinus canaliculatus, Meyer) have been 

 discovered ; this animal at that time was very widely distributed. 

 A second species (D. acutidens, Meyer) has been discovered at 

 Moliere. 



Side by side with the remains of these animals, which un- 

 doubtedly lived in the sea, shells and bones of land animals are 

 found in the marine Molasse, having been carried down by floods 

 into the sea, and thus accidentally associated with the true 

 marine fauna. 



Land Mollusca have been already mentioned, some of which 

 (such as the Auriculas) very probably lived on the sea-shore, 

 whilst others (such as the freshwater species and many snails) 

 may have been swept down to the sea from a great distance. 

 Among the Mammalia the teeth of two mastodons (Mastodon 

 angustidens and tapiroides) are found in the Shell-sandstone ; 

 and the remains of the tapir, of two rhinoceroses (R. incisivus 

 and R. minutus), of a Hyotherium (H. Meissneri), of aHipparion 

 (H. gracile), and of two deer (Cervus Scheuchzeri, Meyer, sp., 

 and C. minor) have been collected from the marine Molasse, 

 proving that at that time these animals inhabited Switzerland. 



