607 



Lagostomus lateralis: 307, 319, 322, 323. 

 Lagostomus minimus: 306, 307, 310, 313, 318, 



322, 323. 

 Lagostomus pallidens: 307, 319, 322, 323.. 

 Lagostomus primigenius: 307, 320, 322, 323. 

 Lagostomus spicatus: 306, 307, 316, 322, 323. 

 Lagostomus trichodactylus: 80, 81, 94, 98, 102, 



104, 107, 109, 112, 307, 308, 310, 311, 312, 



3M. 3i5, 316, 318, 322, 323, 360, 361. 

 Lagostomus trichodactylus f. angustidens: 308, 



322. 

 Lagostomus trichodactylus fossilis: 308. 

 Lagostomus vizcacha: 308. 

 Lasiuromys: 265, 266. 

 Lasiuromys villosus: 264. 

 Leporidae: 190. 

 Lepus: 190. 



Lepus brasiliensis : 190, 191. 

 Lepus aff. brasiliensis: 191. 

 Lepus tapeti: 190. 

 Lestodon: 11, 70, 112, 129, 136. 

 Lestodon armatus: 11. 

 Lestodon trigonidens: 123. 

 Loncheres: 265, 266. 

 Loncheres armatus: 264. 

 Lutra: 498, 542. 

 Lutra brasiliensis: 549! 

 Lutra paranensis: 542. 

 Lutra platensis: 542. 

 Lyncodon: 498, 547, 581. 

 Lyncodon lujanensis: 547, 550. 

 Lyncodon patagonicus: 547, 550. 



M 



Macrauchenia: 24, 58, 124, 125, 126. 



Macrauchenia antiqua: 136. 



Macrauchenia ensenadensis: 63, 64, 69, 128, 



129, 130. 

 Macrauchenia patachonica: 69, 89, 120. 

 Macrocyon: 498, 517, 518, 519, 524, 526, 527. 

 Macrocyon robustus: 120, 518, 520, 521. 

 Macroeuphractus: 58. 

 Macroeuphractus retusus: 136. 

 Macropristis: 453. 

 Macropristis Marshi: 89, 453. 

 Macropoda: 448, 452, 454. 

 Macropodidae: 453, 454. 

 Macropus: 454. 

 Machaerodus: 215, 424, 498, 564, 565, 566, 567, 



568, 569, S70, 57i, 573, 574. 578. 

 Machaerodus ensenadensis: 130, 573, 574. 

 Machaerodus necator: 568. 

 Machaerodus neogaeus: 564, 565, 566, 568. 

 Machaerodus Pradosi: 567. 

 Mammalia: 84. 

 Mará magellanica: 377. 

 Mastodon: 67, 70, 89, 91, 112, 123. 

 •Mastodon Humboldti: 69, 112, 113. 

 Mastodon platensis: 63, 66, 69, 89, 129. 

 Mastodon rectus: 16. 

 Mastodon superbus: 104. 

 Mastonotus Popelairi: 231. 

 Mephitis: 498, 543, 549- 

 Mephitis castanea: 544. 



Mephitis cordubensis: 543, 546, 549, 550. 



Mephitis fossilis: 549. 



Mephitis mercedensis: 543, 545, 550. 



Mephitis patagónica: 544. 



Mephitis primaeva: 543, 544, 549, 550. 



Mephitis.suffocans: 543, 544, 550. 



Megamys: 23, 28, 39, 51, 58, 89, 244, 258, 259, 

 262, 292, 319, 325, 326, 327, 328, 329, 330, 

 331, 332, 333, 334. 339, 342, 343, 344, B45, 



346, 348, 349, 351, 353, 355, 356, 357, 358, 

 359, 360, 361, 362, 405. 



Megamys Burmeisteri: 329, 353, 355. 

 Megamys depressidens: 328, 341, 342, 348, 356. 

 Megamys formosus: 58, 135, 329, 355, 356. 

 Megamys Holmbergi: 328, 329, 343, 345, 346, 



347, 348- 



Megamys laevigatus: 328, 358. 



Megamys Laurillardi: 328, 339, 342, 343, 345, 



347, 356. 

 Megamys patagoniensis: 326, 327, 328, 329, 



333, 334, 339, 340, 341, 342, 347, 349, 35o» 



35i, 353- 

 Megamys praependens: 329, 351, 353. 

 Megamys Racedoi: 328, 329, 341, 347, 349, 35i» 



3S3, 355- 

 Meganthereon neogaeus: 568. 

 Megatherium: 22, 70, 80, 89, 91, 102, 104, 129, 



133, 141, 144- 

 Megatherium americanum: 10, 123. 

 Menotherium lemurinum: 181. 

 Mesomys: 264, 265, 266, 289. 

 Mesomys mordax: 264. 

 Mesomys spinosus: 264. 

 Mesonyx: 490. 

 Mesotheríum: 28, 453. 

 Mesotherium Marshi: 453. 

 Metachirus: 473. 



Metasimia: 168, 169, 171, 172, 175, 177. 

 Methylobates : 161, 162, 163, 165, 166, 175. 

 Micriobiotheria: 448, 584. 

 Microbiotheridae: 449. 

 Microbiotherium: 449. 



Microbiotherium tehuelchum: 449, 450, 451. 

 Microbiotherium patagonicum: 449. 

 Microcavia: 364, 388, 397, 399, 439, 444, 445- 

 Microcavia dubia: 392. 

 Microcavia intermedia: 391, 392. 

 Microcavia prona: 392. 



Microcavia robusta: 114, 120, 389, 391, 392. 

 Microcavia typica: 388, 389, 390, 391, 392. 

 Microcavia uncinata: 392. 

 Microlestes: 457. 

 Molossus cynocephalus: 589. 

 Molossus nasutus: 589. 

 Molossus rugosus: 589. 

 Monotremata: 84. 



Morenia: 230, 254, 256, 258, 259, 264, 265, 266. 

 Morenia complácita: 257. 

 Morenia elephantina: 255, 257. 

 Mufiifelis bonariensis: 563, 5.68. 

 Mus brasiliensis: 205. 

 Mus callosus: 204. 

 Mus castoroides: 231. 

 Mus coy pus: 231. 



