Transverse section through the pectoral fin of a Scyllium embryo of stage P, magnified 50 diameters.
The breadth of the pectoral fin, as shown by the skeleton, was 5¾ inches.
To the small hypercoracoid and hypocoracoid the pectoral fin is attached.
pectoral fin on a level with the eye and small; ventral under the center of the pectoral; caudal, slim and forked.
What I had before imagined to be either a spine or fin turned out to be a pectoral fin.
The earliest stage of the pectoral fin differs from that of the pelvic fin only in minor points.
pectoral fin of an embryo of Scyllium stellare, magnified 16 diameters.
In Polypterus the pectoral fin (fig. 18, B) shows three ossifications in the basal part of the fin—pro-, meso- and metapterygium.
pectoral fin ovately rounded, with faint yellow transverse bands.
The pectoral fin or arm is fastened to a series of bones called the shoulder girdle.