Fig. 14.—Left clavicle of Gyrosteus mirabilis, outer aspect; one-sixth nat. size. [No. P. 3356 d.] 
Fig. 15.—Left clavicle of the recent Acipenser, outer aspect; reduced. 
Fig. 16.—Right supraclavicle of Gyrosteus mirabilis, inner aspect; one-sixth nat. size. [No. P. 3356^.] 
40 
ACTINOPTEKYGII, 
