Ossifications, dermal, in Anura, [31], [34], [179], [190], [210], [211]
Osteoderms = ossifications in the skin, of Sphargis, [337];
of Caiman, [337];
of Lizards, [504], [513], [514]
Osteolaemus, [450];
O. tetraspis, [466]
Ouaran, [543]
Oudenodon, [301];
O. rugosus, [310]
Ovary, [49]