148 DISTRiBUTION QF EXTINCT ANIMALS. [PART II. 
productive deposits be found in South America of middle Ter- 
tiary age. 
Pliocene Mammalia of the Antilles—These may be noticed 
here, 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. They consist of remains of two large 
animals belonging to the South American Chinchillidz, found in 
cave deposits in the island of Anguilla, and forming two new 
genera, Amblyrhiza and Loxomylus ; and remain allied to Mega- 
lonyx from Cuba, which have been named Megalocnus and 
Myomorphus. 
Eocene fauna of South 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 
show us another change in the scenery of the great drama of 
life; there being apparently a considerable resemblance, at this 
epoch, between South America and Europe. They consist of a 
large extinct feline animal, Hutemnodus; of Palwotherium and 
Anoplotherium, the well-known extinct Ungulates of the Euro- 
pean Tertiaries, and which have never been found in North 
America; and of three genera of Rodents,—Theridromys, allied 
to Hchimys, and found also in the Eocene and Miocene of France ; 
Megamys, allied to the living Capromys of the Antilles, and 
also to Paleomys, 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. No Edentates have been found. 
The resemblances of this 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 epoch, before we can 
venture to speculate on their bearing as regards the early mi- 
grations of organic forms. 
General Remarks on the Extinct Mammalian Fauna of the Old 
