Fig. 15

The eye muscles of Columba livia in lateral view. a to c represent increasingly deep dissections. a the nictitating membrane and associated ligament, b the intrinsic and extrinsic muscles, c the extrinsic muscles only
The eye muscles of Columba livia in lateral view. a to c represent increasingly deep dissections. a the nictitating membrane and associated ligament, b the intrinsic and extrinsic muscles, c the extrinsic muscles only