610 



Procyon cancrivorus: 523. 



Prochiroptera: 586, 587. 



Prolagostomus : 46, 292, 293, 296, 299, 300, 



307, 319. 321, 322, 323, 361, 362. 

 Prolagostomus divisus: 301. 

 Prolagostomus imperialis: 302. 

 Prolagostomus profluens: 302, 303. 

 Prolagostomus pusillus: 300, 302, 323. 

 Promops: 590. 

 Promops bonaríensis: 590. 

 Propalaeoplophorus: 46. 

 Propraopus: 89. 

 Propraopus grandis: 64, 129. 

 Prosimia: 85, 181, 186. 

 Proterotheridae: 89. 

 Proterotherium: 46, 89. 

 Prothomo: 172, 174, 175. 

 Prothylobates: 174, 175. 

 Protocyon troglodytes: 524. 

 Protopithecus: 127. 

 Protopithecus bonaríensis: 127, 128. 

 Protopithecus brasiliensis : 180. 

 Protosimia: 175, 176. 

 Protoxodon: 45, 46. 

 Protroglodytes: 175, 177. 

 Protypotherium: 46. 

 Pseudoelurus: 582. 

 Pseudolestodon: 11, 70. 

 Pterodon: 470, 487, 496, 497. 

 Ptetica: 85, 586. 

 Ptilodus: 456, 4S7» 466, 467. 

 Ptyssophorus : 193, 195, 207, 210. 

 Ptyssophorus elegans: 195. 

 Pyrotherium: is, 39. 

 Pyrotherium Romeroi: 89. 



R 



Raja Agassizi: 51. 

 Reithrodon: 94, 193, 194, 210. 

 Reithrodon cuniculoides : 194. 

 Reithrodon chinchilloides: 195. 

 Reithrodon fossilis: 113, 120, 194. 

 Reithrodon typicus: 104, 194. 

 Reithrodon typicus fossilis: 194. 

 Rhamphostoma neogaea: 51. 

 Rhea americana: 93. 

 Rhinopoma carolinensis: 589. 

 Rhipidomys: 213. 

 Rhipidomys mastacalis: 213. 

 Rhizocupressinoxylon: 52. 

 Ribodon: 51, 89. 

 Rodentia: 187, 188. 



Sarcobora: 187, 467, 468, 470, 586, 592. 

 Saurocetes: 593. 

 Saurocetes argentinus: 593. 

 Scalabrinitherium: 39, 89. 

 Scalaria rugulosa: 54. 

 Scapteromys: 213. 

 Scapteromys fronto: 213. 

 Scapteromys labiosus: 213. 

 Scapteromys principalis: 213. 



Scelidotherium: 11, 24, 58, 70, 90, 117, 121, 



124, 125, 128, 129, 130, 144. 

 Scelidotherium Bravardi: 11. 

 Scelidotherium Capellinii: 63, 64, 67, 89, 126, 



128, 129, 131. 



Scelidotherium leptocephalum: n, 120, 128, 



129, 131. 

 Scelidotherium patrium: 58, 136. 

 Sciamys: 46, 218, 222, 228, 243, 446. 

 Sciamys principalis: 223. 

 Sciamys varians: 223. 

 Sciuromorpha: 189, 191. 



Sciurus aestuans: 191. 



Sciurus tricolor: 191. 



Scleromys: 230, 241, 265, 266. 



Scleromys angustus: 241. 



Scotaeumys: 292, 324, 361, 362. 



Scotaeumys imminutus: 324. 



Schistomys: 364, 369, 370, 444, 445. 



Schistomys erro: 369. 



Schizodon: 267, 279, 280, 282, 286, 288, 289, 



290. 

 Schizodon fuscus: 288. 

 Sphaerium convexum: 72. 

 Sphaeromys: 292, 293, 323, 361, 362, 446. 

 Sphaeromys irruptus: 293. 

 Sphiggomys: 292, 295, 362. 

 Sphiggomys zonatus: 295. 

 Sphiggurus spinosus: 228. 

 Sphiggurus villosus: 228. 

 Sphingurus: 218, 225, 227, 228. 

 Sphingurus insidiosus: 228. 

 Sphingurus magnus: 228. 

 Sphingurus prehensilis: 227, 22S. 

 Sphodromys: 292, 293, 362. 

 Sphodromys scalaris: 294. 

 Sigmodon vulpinus: 205. 

 Silurus Agassizi: 51. 

 Simia: 168, 169, 171, 172, i7S« 

 Simioidea: 85, 178, 185, 186. 

 Sipalocyon: 483, 494. 

 Sipalocyon gracilis: 494. 

 Smilodon: 25, 130, 141, 144. 215, 424, 498, 



563. S64, S6s. 566, 567, 568, 569, 570, 571, 



573. 574. 578, 582. 

 Smilodon Blainvillei: 564, 568. 

 Smilodon ensenadensis : 573, 574. 

 Smilodon necator: 568. 

 Smilodon neógaeus: 564, 568. 

 Smilodon populator: 69, 130, 563, 564, 565, 



566, 567, S68, 574- 

 Solecurtus platensis: 77. 

 Spalacopus: 288, 289, 290. 



Spaniomys: 46, 230, 245, 246, 264, 265, 266. 

 Spaniomys modestus: 247. 

 Spaniomys riparius: 246. 

 Speothos pacivoros: 524. 

 Steiromys: 46, 218, 223, 228, 446. 

 Steiromys detentus: 225, 227. 

 Steiromys duplicatus: 227. 

 Stegotherium: 46. 

 Stenoderma chilensis: 588. 

 Struthiolaria ornata: 54. 

 Stichomys: 230, 243, 246, 264, 265, 266. 



