the anatomy of the dugong. 
3 2 3 
Plate XXIX. 
Consists of two figures of the natural size; from the 
dugong eight feet long. 
Fig. 1. A portion of trachea below the bifurcation, to 
show the connection of the rings. 
Fig. 2. A portion of the lungs of the same dugong, to 
show the appearance of the cells, and the internal surface of 
the bronchia. 
Plate XXX. 
Consists of two figures. 
Fig. i. The glans penis of the natural size; from the du- 
gong eight feet long. 
Fig. 2. Vagina and uterus of the natural size ; from the 
dugong, four feet six inches long. 
Plate XXXI. 
Consists of two figures. 
Fig. l. The sternum in the young dugong, to show that 
the ribs are attached to a ligament between two portions of 
bone ; but in the older, all these parts are ossified. The parts 
are of the natural size. This peculiarity must render the 
body more flexible at that ag e. 
Fig. 2. The bones forming a substitute for the pelvis in 
the female dugong, four feet six inches long ; of the natural 
size. 
