598 



MUSEO XACIOXAL DE BUENOS AIRES. 



Mytilus patagonicus, 270, 411 

 Mytilus perna, 380, 534. 

 Mytilus platensis, 270. 

 Mytilus Rodriguezi, 878. 



Mytilus striatus, 8G. 



Mytilus subcylindricus, 333. 346. 



Mytilus trigonus, 357, 380. 



N. 



Nacella, 122, 436, 497, 503, 512, 52G. 



Nacella aff. fuegiensis, 436. 



Nacella fuegiensis, 520. 



Nacella magellanica, 399, 420, 520. 



Nacella pigmaea, 333, 339. 



Nassa, 92, 190, 504. 



Nassa Isabellei, 447. 



Nassa taeniolata, 517, 525. 



Nassa vibes, 425, 426. 



Natica, 150. 151, 153, 486. 



Natica canrena, 150, 151. 



Natica chiloensis. 341. 



Natica consimilis, 156, 267. 



Natica Darwini, 71, 152, 153, 155. 



Natica dilecta, 150. 



Natica entreriana, 366. 



Natica fámula, 156, 158. 



Natica gibbosa, 86. 



Natica hamiltonensis, 86, 91. 



Natica heros, 71. 



Natica Isabelleana, 150, 422, 427. 



Natica maroccana, 532. 



Natica magellanica, 156. 



Natica obtecta, 154, 155. 



Natica omoia, 155. 



Natica ovata, 86. 



Natica ovoidea, 157. 



Natica sagraiana, -532. 



Natica secunda, 153, 155. 



Natica subtenuis, 71, 157. 



Natica tumbeziana, 153. 



Natica Vidali, 155. 



Nautilus, 116. 



Nautilus Carolo-Ameghinoi, 116. 



Nautilus Eomeroi, 30. 



Nautilus Valencienni, 3, 30, 41 . 



Neilo ornata, 4, 228. 



Neithea, 46, 47. 



Neocorbicula, 469. 



Neoimbricaria, 67, 71, 79,90,109,110, 196, 



198, 200, 202, 494, 495, 500, 514. 

 Neoimbricaria confinis, 100, 2(00. 

 Neoimbricaria gracilior, 100, 200. 



Neoimbricaria patagónica, 10(), 196, 200, 



202. 

 Neoimbricaria plicifera, 100, 196, 200. 

 Neoimbricaria quemadensis, 100, 196, 



199. 

 Neoimbricaria quemadensis juliana, 100, 



198. 

 Neoinoceramus, 75, 95, 489, 500, 561. 

 NeoinoceramusAmeghinoi, 102,243, 244, 



561. 

 Neomphalius, 126-128, 136, 500, 504. 

 Neomphalius abavus, 97, 134. 

 Neomi^halius americanus, 97, 134. 

 Neomphalius corrugatus, 126. 

 Neomphalius laevigatus, 357, 364. 

 Neomphalius patagonicus. 126, 392, 400, 



422, 425, 427. 

 Neomphalius princeps, 97, 134. 

 Neomphalius viridulus, 128, 531. 

 Nerita, 91, 536. 

 Nerita ascensionis, 534. 

 Nerita versicolor, 534. 

 Neritopsis, 86, 91. 

 Nisso, 561. 

 Nucula, 30, 499, 504. 

 Nucula Chasteli, 71. 

 Nucula crenulata, 226. 

 Nucula dynaster, 3, 4, 30. 

 Nucula Errazurizi, 229. 

 Nucula glabra, 231. 

 Nucula observatoria, 101, 227. 

 Nucula ornata, 4. 



Nucula patagónica, 70, 101, 108, 225, 226. 

 Nucula peregrina, 70. 

 Nucula pisum, 226, 227, 517, 525. 

 Nucula placentina, 4. 

 Nucula puelcha, 225, 357, 359, 860, 871, 



420, 423. 

 Nucula reticularis, 71, 226. 

 Nucula semiornata, 71, 73, 101, 108i 



225-227, 423, 429, 538, 558. 

 Nucula tricésima, 101, 109, 226. 

 Nucula valdiviana, 4. 



