Ostend. near Bacton, [812].

Osteology of birds, [760].

--------- fishes, [572].

--------- mammals, [776].

--------- reptiles, [651].

Osteolepis, [618].

Ostracoda, [526].

Ostrea carinata, [396].

------ deltoidea, [396].

------ plicata, [396].