562 



MUSEO NACIONAL DE BUENOS AIRES. 



Schizaster Amegliinoi, 137, 142, 169, 505. 



Schizaster deletus, 57, 508. 



Schizaster patagonicus, 169. 



Schizaster Philippii, 170. 



Schizechinus, 169. 



Schizotherium, 318. 



Schizotherium priscum, 320. 



Sciamys, 241, 411, 478. 



Sciamys latidens, 410. 



Sciuroides, 243, 244. 



Sciuromvs, 244. 



Sciuropterus, 243. 



Sciurus, 244. 



Sciurus hudsonicus, 367. 



Sclerocalyptus, 482, 484-488. 



Sclerocalyptus cordubensis, 500. 



Sclerocalyptus ornatus, 500. 



Scleromys, 241, 410, 478. 



Scleromys angustus, 409. 



Scotaeiimys, 241, 417, 478. 



Scotaeumys imminutus, 417. 



Scutella, 169. 



Scutella patagonensis, 132-134. 



Selatherium, 476, 477. 



Selenoconus, 290, 467, 507. 



Selenoconus agilis, 291. 



Selenoconus centralis, 291. 



Senodon, 471. 



Serpula Phillipsi, 508. 



Sigapatella americana, 161, 163. 



Simplimus, 482. 



Simplimus indivisus, 268. 



Sipalocyon, 479. 



Siphonalia dilatata, 504. 



Siphonaria Lessoni, 279. 



Smilodon, 487-489, 500. 



Smittia, 199, 200. 



Smittia incisa, 190. 



Smittia (Mucronella) coronata, 190. 



Smittia (Mucronella) expectans, 190, 197. 



Smittia (Mucronella) Grotriani, 190,197. 



Smittia (Reussia) patagónica, 190. 



Smittia (Reussia) Seguenzai, 190, 199. 



Smittia subtorquata, 190. 



Solecurtus gratus, 57. 



Spalacopus, 241. 



Spaniomys. 241, 416, 474, 478. 



Spaniomys riparius, 415. 



Sphaeromys, 478. 



Sphenotherus, 482, 484. 



Sphenotherus Zavaletianus, 501. 



Sphirna prisca, 185, 259, 464. 



Sphodrodromys, 241. 



Spiropora, 199, 200. 



Spiropora verticillata, 191, 197, 198. 



Spirorbis patagónica, 57. 



Squatina, 186. 



Squatina gigantea, 178, 183. 



Stegotherium, 374, 375, 475, 477, 480. 



Stegotherium tessellatum, 501. 



Steiromys, 215," 241, 363, 474-476, 478, 



483. 

 Steiromys detentus, 362, 366. 

 Steiromys principalis, 505. 

 Steneofiber. 243, 408, 410. 

 Steneofiber Esseri, 408. 

 Steneofiber minutus, 410. 

 Steneofiber sigmodon, 409, 410. 

 Steno, 492. 



Stenodelphis, 473, 490, 492. 

 Stenogenium, 470, 472. 

 Stenostephanos, 476, 481. 

 Stenotatus, 480. 

 Stereohippus, 486, 500. 

 Stereopternum, 281. 

 Stereotoxodon, 482, 501. 

 Stereotoxodon tehuelche, 268. 

 Stichomys, 241, 478. 

 Stigmatopygus, 171. 

 Stilauchenia, 487. 

 Stilhippus, 474, 

 Stilotherium, 358, 479. 

 Stilotherium dissimile, 357. 

 Strabosodon, 482. 

 Strata, 481. 



Strongylocentrotus albus, 170. 

 Strophocheilus, 93. 

 Strophocheilus Hauthali, 83. 

 Strophostephanos, 481. 

 Struthiolaria, 68, 1.55. 

 Struthiolaria Ameghinoi, 131-135, 504. 

 Struthiolaria chilensis, 155, 156. 

 Struthiolaria chilensis var. fuegina, 515. 

 Struthiolaria densestriata, 68, 505. 

 Struthiolaria Hatcheri, 515. 

 Struthiolaria prisca, 51, 508. 

 Struthiolariopsis túmida, 51, 56, 57. 

 Sturnira, 492. 

 Stylognathus, 479. 

 Sylvilagus, 491. 



Synechodus patagonicus, 70, 506, 507. 

 Synechodus Viedmai, 70. 

 Systemodon, 326. 



