MOEPHOLOGT OF THE GALLINACEiE. 



243 



XVII.— DESCRIPTION OP THE PLATES. 



Plate XXII. 



Skeleton of embryo of Gallus domesticus, side view ; 1st stage (7 days' incubation) . Magnified 



13J diameters. 



Plate XXIII. 



Fig. 1. 1st stage continued; part of basis cranii and cervical region of vertebral column, lower view. 

 Magn. 20 diams. 



2. The same; 13th and 14th cervical vertebrae, lower view. Magn. 20 diams. 



3. The same object, upper view. Magn. 20 diams. 



4. The same ; pelvis and caudal vertebraj, lower view. Magn. 20 diams. 



5. 2nd stage (embryo of 8 days) ; sacral and caudal vertebrte, lower view. Magn. 20 diams. 



