148 DISTIUBUTION OF EXTINCT ANIMALS. [part n. 



productive deposits Le found in Soutli America of middle Ter- 

 tiar}^ age. 



Fliuccne 31amrnalia of the Anfilks. — These may be noticed 

 liere, as they are of special interest, proving the connection of 

 the larger West Indian Islands with the Continent some time in 

 the later Tertiary period. Tliey consist of remains of two large 

 animals belonging to the South American Chinchillidpe, found in 

 cave deposits in the island of Anguilla, and forming two new 

 genera, Aiiiblyrliiza and Loxoni)/lns ; and remain allied to Mcga- 

 lonyx from Cuba, which have been named Mcgalocmis and 

 lilyomorplius. 



Eocene fauna of Soaili America. — The few remains yet dis- 

 covered in the Tertiary deposits of the Pampas which are believed 

 to be of Eocene age, are exceedingly interesting, because they 

 sliow us another change in the scenery of the great drama of 

 life; there being apparently a considerable resemblance, at this 

 epoch, between Suutli America and Europe. They consist of a 

 laro-e extinct feline animal, EiUcmnodns ; of Palccotherium and 

 Anoi>Ioihcrium, the well-known extinct Ungulates of the Euro- 

 }iean Tertiaries, and which have never been found in Nortli 

 America; and of three genera of Eodents, — Theridromys, allied 

 to Echimys, and found also in the Eocene and Miocene of France ; 

 Megamys, allied to the living Capromys of the Antilles, and 

 also to Pakeomys, an extinct form of the French Miocene; and 

 a very large animal referred to Arvicola, a genus found also in 

 the Pliocene deposits of South America, and abundant in the 

 northern hemisphere. Xo Edentates have been found. 



The resemblances of tliis fauna to that of Europe rather than 

 to any part of America, are so strong, that they can hardly be 

 accidental. We greatly want, however, more information on this 

 point, as well as some corresponding evidences as to the condition 

 of West and South Africa about the same epocli, before we can 

 venture to speculate on their bearing as regards the early mi- 

 grations of organic forms. 



Gcnercd BcmarJcs on (he E.ctiact iranimcdian Fauna of the Old 



