ii. 202
OTARIIDÆ, ii. 202
OTIDIDÆ, ii. 356
_Otidiphaps_, ii. 333
_Otilophus_, ii. 415, 428
_Otis_, ii. 356
_Otocorys_, ii. 289
_Otocryptis_, ii. 402
_Otogyps_, ii. 346
_Otomys_, ii. 230
_Otopoma_, ii. 521
_Ovibos_, N. American Post-Pliocene, i. 130
OTARIIDÆ, ii. 202
OTIDIDÆ, ii. 356
_Otidiphaps_, ii. 333
_Otilophus_, ii. 415, 428
_Otis_, ii. 356
_Otocorys_, ii. 289
_Otocryptis_, ii. 402
_Otogyps_, ii. 346
_Otomys_, ii. 230
_Otopoma_, ii. 521
_Ovibos_, N. American Post-Pliocene, i. 130