Onager, 196

Oorial, or Sha, 224

Opossums, 359

Opo"sums, Australian Grey, 363

Opo"sums, Black or Sooty, 359

Opo"sums, Common Grey, 362-3-4

Opo"sums, Meriam's, 378

Opo"sums, Murine, 378-80

Opo"sums, Philander, 379

Opo"sums, Ring-tailed, 364-5