554 



MUSEO NACIONAL DE BUENOS AIRES. 



M. 



Macacus, 426. 

 Macacus arctoides, 443-445. 

 Macacus cynocephalus, 428. 

 Macacus inuus, 425, 427. 

 Machaerodus, 487. 

 Machlydotherium, 468, 470, 506. 

 Macrauchenia, 276, 487, 489. 

 Macrauchenia patachonica, 275, 499, 



500. 

 Macrocallista arenophila, 515. 

 Macrocallista Rodriguezi, 515. 

 Macrocyon,488, 489. 

 Macroeuphractus, 485, 501. 

 Macrorhinus, 492. 

 Mactra, 51. 

 Mactra Darwini, 132. 

 Magellania, 141. 

 Magellania Ameghinoi, 141. 

 Magellania globosa, 141. 

 Magiíllania lenticularis, 137, 141. 

 Magellania Ortmanni, 505. 

 Magellania patagónica, 141, 142. 

 Magestus, 478. 

 Malletia gracilis, 57, 511. 

 Malletia ornata, 50. 

 Malletia rudis, 57. 

 Mannodon, 476. 

 Mannodon trisulcatus, 504. 

 Marcia arenosa, 515. 

 Marcia difficilis, 515. 

 Marginella prunum, 246. 

 Marginella quemadensis, 504. 

 Martesia cazadorina, 57. 

 Martesia patagónica, 132. 

 Mastodon, 285, 341, 485, 486, 488-490. 

 Mastodon argentinus, 500. 

 Mastodon Humboldti, 499. 

 Mastodon longirostris, 333, 338, 340. 

 Mastodon Maderianus, 500. 

 Mastodon superbus, 499. 

 Matyoscor, 486. 

 Maxshlosseria, 468, 507. 

 Mazama, 490, 491. 

 Mecorhinus, 479. 

 Megalohj'rax, 305. 

 Megalohyrax eocaenus, 305. 

 Megalonychotherium, 479. 

 Megalosaurus, 466. 

 Megalosaurus hungaricus, 81. 

 Megamys, 252, 480-482, 485, 502. 

 Megaptera. 492. 

 Megathericulus, 483, 501. 



Megathericulus patagonicus, 268. 

 Megatherium, 482, 484, 485, 487, 488, 489. 

 Megatherium americanum, 499. 

 Melania, 54, 55, 68, 510. 

 Meles taxus, 440. 

 Melicerita, 192, 198. 

 Melicerita triforis, 198. 

 Membranipora concatenata, 189, 192, 



197, 198. 

 Membranipora flabellata, 189. 

 Membranipora flustoides, 189, 196. 

 Membranipora laevigata, 189. 

 Menilaus, 482. 

 Meniscoéssus, 359. 

 Meniscoéssus conquistus, 359. 

 Meretrix Iheringi, 161. 

 Meretrix pseudocrassa, 151, 161 . 

 Meretrix splendida, 161. 

 Mesocetus, 473. 

 Mesolama, 487, 499. 

 Mesoplodon, 492. 

 Mesorhinus, 481. 

 Mesosaurus, 281. 

 Metaepanorthus, 478. 

 Metamynodon, 325. 

 Metamynodon planifrons, 326. 

 Meteutatus, 212, 468, 470, 472, 506. 

 Metopotoxus, 477, 480. 

 Metriodromus, 478. 

 Microbiotherium, 479. 

 Microbiotherium tehuelchum, 386. 

 Microcavia, 485, 488, 489. 

 Microcoelus patagonicus, 508. 

 Micropora, 199. 

 MicroiJora coriácea, 189, 196. 

 Microporella, 199, 200. 

 Microporella divaricata, 189. 

 Microporella fallax, 189. 

 Microporella Malusi, 189, 192, 194-196, 



461. 

 Microstylops, 320, 467. 

 Microstylops clarus, 321. 

 Microstylops monoconus, 507. 

 Microsyops, 421-423. 

 Microsyops elegans, 422. 

 Microtragulus, 344, 404, 484, 501. 

 Microtragulus argentinus, 344. 

 Miolania, 80, 466, 507. 

 Miolania argentina, 79-81. 

 Mixodectes, 284. 

 Modiola contorta, 517. 

 Modiola rionegreusis, 50, 508. 



