ANATOMY OF THE LIZARD. 



493 



Fig. 440. Anatomy of a lizard, Sceleporus undulatus. t, trachea { <?, carotid artery; 

 th, thyroid gland ; ft, ventricle of the heart above are the two auricles ; lu, lung ; 

 /, liver turned out; #, stomach ; i, intestine ; a, vent above it the cloaca is laid 

 open to disclose the openings (o o) of the kidneys (&); above are the two openings of 

 the oviducts ; n, oviduct ; o, ovary ; , vena cava ; /, fat-body. Drawn by A. F. 

 Gray from dissections made by the author. 



