600 



MUSEO NACIONAL DE BUENOS AIRES. 



Ostrea Wilckensis, 13, 14, 30. 

 Ostrea Wullerstorfii, 85. 

 Oxyrhina Desori, 88. 



Oxyrhina hastalis, 87. 

 Oxystele, 559. 



P. 



Pachycymbiola, 209. 

 Paludestrinaaustralis, 465. 

 Paldestrina Parchapii, 465. 

 Pandora, 502, 505. 

 Pandora brasiliensis, 586. 

 Panopaea, 27, 86, 328, 351, 499, 501. 

 Panopaea abbreviata, 322. 

 Panopaea antárctica, 322. 

 Panopaea bagualesia, 105, IOS, 324-326. 

 Panopaea cancellata, 327. 

 Panopaea Ibari, 327, 328, 833, 352. 

 Panopaea nucleus, 105, 108, 324, 326. 

 Panopaea oblonga, 326. 

 Panopaea órbita, 86. 

 Panopaea orientalis, 59. 

 Panopaea pañis, 105, 108, 324, 327. 

 Panopaea Pilsbryi, 392, 418. 

 Panopaea quemadensis, 105, 109, 111, 



325, 328, 329. 

 Panopaea regularis, 105, 108, 324, 327, 



328, 358, 361, 388 

 Panopaea sierrana, 105, 108, 111, 325, 



328, 829. 

 Panopaea subsymmetrica, 338, 851. 

 Panopaea Torres!, 333, 351 . 

 Panopaea truucata, 327, 388. 

 Panopaea Worthingtoni, 86. 

 Patella, 122. 



Patella barbara, 497, 509. 

 Patella pygmaea, 339. 

 Pectén, 47, 248, 251. 

 Pectén actinodes, 408. 

 Pectén aff. centralis, 409. 

 Pectén aff. nodosus. 410. 

 Pectén aff. tehuelchana, 408. 

 Pectén athleta, 250. 

 Pectén centralis, 250-252. 

 Pectén Darwini, 249. 

 Pectén Darwinianus, 379. 

 Pectén deseadensis, 410. 

 Pectén fissocostalis, 255. 

 Pectén geminatus, 254, 255. 

 Pectén jorgensis, 258. 

 Pectén Lischkei, 249. 

 Pectén Madisonius, 377. 

 Pectén maximus, 251. 

 Pectén nodosoplicatus, 256. 

 Pectén oblongus, 356, 357, 375. 



Pectén (jblongus pyramidesius, 854, 357, 



375. 

 Pectén paranensis, 254, 255, 376, 877, 408. 

 Pectén paranensis, var. deseadensis, 410 

 Pectén jDatagonensis, 257. 

 Pectén piconus, 46, 47, 55. 

 Pectén polymorphoides, 91. 

 Pectén praenuncius, 251-254. 

 Pectén proximus, 252. 

 Pectén quemadensis, 256. 

 Pectén Simoni, 250. 

 Pectén tehuelchus, 876. 

 Pectén Thomasi, 249. 

 Pectunculus, 75. 



Pectunculus aff. intermediiis, 517. 

 Pectunculus cuevensis, 240, 378. 

 Pectunculus globosus, 85. 

 Pectunculus Ibari, 845. 

 Pectunculus laticostatus, 85, 91. 

 Pectunculus magellanicus, 345. 

 Pectunculus minutus, 372. 

 Pectunculus pulvinatus cuevensis, 240, 



873. 

 Pectunculus symmetricus, 372. 

 Peratotoma, 219. 



Peratotoma Iheringi, 101, 109, 221. 

 Perisphinistes, 41. 

 Peristernia, 92. 

 Perna, 92, 485, 492, 500. 

 Perna quadrisulcata, 102, 107, 248. 

 Persicula sagittata, 536. 

 Persona, 514. 

 Petaloconchus, 167. 

 Petricola lapicida, 42o. 

 Petricola patagónica, 420. 

 Petricola pholadiformis, 532. 

 Petricola robusta, 532. 

 Petricola typica, 531. 

 Phacoides, 80, 288, 499, 501. 

 Phacoides Childreni, 530. 

 Phacoides Childreni Xantusi, 531. 

 Phacoides Dalli, 104, 109, 289. 

 Phacoides neglecta, 383, 847. 

 Phacoides Ortmanni, 104, 108, 289. 

 Phacoides pectinatus, 428. 

 Phacoides promaucana, 25, 82, 288, 333, 



348. 



