468 Prof. K. A. von Zittel—On the Mammatia. 
appearance in the Pliocene, Southern India may be considered as 
the original home, even though the Sivalik beds may not contain in 
places, as Lydekker supposes, genuine Pliocene forms. 
In strong contrast to the Miocene mammalian fauna spread over 
the entire Northern hemisphere, stand the probably contemporaneous 
forms of the so-called ‘“ Patagonia formation,” in Patagonia and 
Uruguay. If one compares the following list of the genera known 
up to the present from these beds (from which the marine mammals, 
on account of their peculiar conditions of distribution, should be 
excluded) with those from North America, Asia, or Europe, it will 
be seen that their indigenous South American, or, according to 
Wallace’s terminology, ‘‘ Neotropical,” character stands out not less 
prominently than in the older fauna of Santa Cruz. 
MARSUPIALIA. Dasypoda. Myopotamus. 
? Wotictes. Proeuphractus. Lucardiodon. 
Afpera. Stenotatus. Anchimys. 
Cynonasua. Chlamydotherium. Procardiotherium. 
? Hutatus. Cardiotherium. 
EDENTATA. Plexocherus. 
Gravigrada. PERISSODACTYLA. Caviodon. 
Proterotheridee. Lagostomus. 
Promegatherium. Proterotherium. Megamys. 
Lnterodon. Brachytherium. Tetrastylus. 
Orthotherium. Neoepiblema. 
Pliomorphus. Macrauchenide. Luphilus. 
Menilaus. Scalabrinitheriunt. Briaromys. 
? Guathopsis. Mesorhinus. Gyriabrus. 
Promylodon. Oxyodontothertum. Calpostemma. 
Pseudolestodon. Macrauchenia. Strophostephanus. 
Lestodon. Paradoxoniys. 
Diodomus. TOXODONTIA. Lfaplostropha. 
Sphenotherus. Toxodon. 
Ranculcus. ? Lutomodus. CETACEA. 
Nephotherium. Xotodon. Pontistes. 
Strabosodon. ? Stenotephanus. Pontivaga. 
Pontoplanodes. 
Glyptodontia. TYPOTHERIA. Ischyrorhynchus. 
Hoplophorus. Protypothertum. Balena. 
Paleohoplophorus. Notzocetus. 
Protoglyptodon. RODENTIA. 
Neuryurus. Discolomys. SIRENIA. 
Lomaphorus. Morenza. Leibodon. 
Pseudoeuryurus. Orthomys. 
The Marsupials, Edentates, Toxodonts, Typotheride, as also the 
Perissodactyla and Rodents contained in the Patagonian (Miocene) 
mammalian faura, are all of specifically South American types, else- 
where unknown. It is a more matured offspring of the Santa Cruz 
fauna, and is only distinguished from it by a stronger differentiation 
of particular genera. There is no trace of any intermixture of foreign 
elements which would indicate a connection with North America or 
with the fauna of the Northern world. | 
(To be concluded in our next Number.) 
Erratum.—Page 409, column 1, in last number, for Artaodactyli read Artiodactyla. 
