609 



Ostrea puelchana: 28, 77. 



Otaria: 105, 579, 580. 



Otaria Byronia: 580. 



Otaria Fischeri: 579. 



Otaria Godeffroyi: 580. 



Otaria Hookeri: 580. 



Otaria jubata: 580. 



Otaria leonina: 580. 



Otaria minor et pigmaea: 580. 



Otaria molossina: 580. 



Otaria Pernetyi: 580. 



Otaria platyrhynchus et chilensis: 580. 



Otaria Ulloae: 580. 



Oxymycterus : 193, 197, 207. 



Oxymycterus breviceps: 198. 



Oxymycterus cosmodus: 198. 



Oxymycterus impexus: 198. 



Oxymycterus nasutus: 197. 



Oxymycterus rufus: 197, 198, 211. 



Oxymycterus rufus fossilis: 197. 



Oxymycterus talpinus: 198. 



Pachyrucos: 45, 46, 58, 69, 289. 



Pachyrucos bonariensis: 14, 63. 



Pachyrucos impressus: 135. 



Pachyrucos typicus: 39, 89, 135. 



Palaeocavia: 58, 364, 372, 388, 391, 394, 439, 



444. 445- 

 Palaeocavia avita: 396. 

 Palaeocavia impar: 394. 

 Palaeocavia minuta: 397. 

 Palaeocavia pampaea: 397. 

 Palaeocyon: 524, 526, 527. 

 Palaeocyon troglodites: 524. 

 Palaeocyon validus: 524. 



Palaeolama: 89, 100, 114, 120, 124, 129, 131. 

 Palaeolama equina: 89. 

 Palaeolama mesolithica: 39, 78, 80, 89, 93, 94, 



104, 106, 107, 109. 

 Palaeolama Weddelli: 113, 120. 

 Palaeothentes: 460. 

 Palaeothentes Aratae: 460, 461. 

 Palaeothentes intermedius: 464. 

 Palaeothentes Lemoinei: 462. 

 Palaeothentes minutus: 465. 

 Palaeothentes pachygnathus : 463. 

 Palaeothentes pressiforatus: 465. 

 Palaeotherium: 25. 

 Palaeoteuthis: 460. 

 Paludestrina Ameghinoi: 28. 

 Panochtus: 59, 70, 114, 129, 131, 132. 

 Panochtus bullifer: 59. 



Panochtus tuberculatus : 10, 69, 114, 120, 124. 

 Paradoxomyidae: 214, 447. 

 Paradoxomys: 214, 225, 226, 446. 

 Paradoxomys cancrivorus: 215, 216, 217. 

 Paradoxomys patagonicus: 217. 

 Pardalina Warwiki: 553. 

 Pectén centralis: 54. 

 Pectén Darwinianus: 53, 89. 

 Pectén geminatus: 54. 

 Pectén paranensis: 53, 54, 89. 

 Pectén patagonensis: 49, 53. 



Pedimana: 468. 



Peltephilus: 46. 



Perameles: 452. 



Peramelia: 448, 452. 



Peratheridae: 469, 584. 



Perimys: 46, 292, 294, 295, 296, 362. 



Perimys erutus: 296, 298. 



Perimys onustus: 297, 298. 



Perimys procerus: 298. 



Pinnipedia: 468, 578, 583. 



Pithanotomys: 58, 267, 279, 280, 281, 282, 284, 



286, 287, 290. 

 Pithanotomys columnaris: 135, 282, 284, 285. 

 Pithanotomys cordubensis: 287. 

 Pithanotomys intermedius: 286. 

 Pithanotomys macer: 286. 

 Pithanotomys similis: 135, 284, 285, 286. 

 Pithecidae: 179, 180. 

 Plagiaulacidae: 39, 46, 89, 455, 460. 

 Plagiaulacoidea: 448, 455, 466. 

 Plagiaulax: 456, 466, 467. 

 Plagiaulax Becklesi: 457. 

 Planops: 46. 

 Planorbis: 81. 



Plaimrbis peregrinus: 72, 80. 

 Planungulata: 85. 



Plataeomys: 267, 279, 280, 282, 286, 290, 446. 

 Plataeomys scindens: 280. 

 Platemys paranensis: 51. 

 Platemys torrentium: 51. 

 Platyonyx: 141. 



Platyarthra: 85, 183, 184, 185, 186. 

 Platyrhynchus leoninus: 580. 

 Platyrhynchus molossinus et uraniae: 580. 

 Plathyrrhini: 178, 179. 

 Plecotus velatus: 591. 

 Plexochoerus: 364, 412, 415, 420, 421, 425, 427, 



428, 429, 430, 431, 442, 445. 

 Plexochoerus adluis: 430, 431. 

 Plexochoerus paranensis: 427, 429, 431. 

 Pliolagostomus: 292, 296, 299, 322, 323, 361, 



362. 

 PlioiagoMomus notatus: 299. 

 Plohophorus: 53, 56, 59. 

 Plohophorus Ameghinoi: 39, 56, 89. 

 Plohophorus figuratus: 58, 136. 

 Plohophorus orientalis: 16. 

 Pontistes rectifrons: 50, 89. 

 Pontoporia: 50, 105, 593. 

 Potamarchus: 325, 329. 

 Potamarchus murinus: 329, 345, 348. 

 Potamys coypou: 231. 

 Proeuphractus: 58. 

 Proeuphractus recens: 136. 

 Praopus aff. hybridus: 114. 

 Praopus hybridus: 94, 104, 107. 

 Proalligator australis: 51. 

 Proanthropomorphus: 175, 178. 

 Procardiotherium: 364, 405, 408, 409, 421, 422, 



444. 445- 

 Procardiotherium crassum: 411. 

 Procardiotherium simplicidens : 409, 410, 411. 

 Procavia: 400, 401. 

 Procavia mesopotamica : 401. 



AMEGHINO — V. VI 



39 



