CLASS OF REPTILES. 



327 



Fig. 288. Anatomy of the Coluber (Common Snake) .* 



* I, tongue and glottis; a?, gullet, cut across at ce' to show the heart, 

 ;., in situ; i, the stomach ; i', the intestine; cl, cloaca ; an, anus ; f, the 

 rer ; o, the ovarium ; o', the ova or eggs ; t, windpipe ; p, principal lung ; 



p', little lung ; vt, ventricle ; c, left auricle ; c 1 , right auricle ; a, left aorta ; 



ad, right aorta ; a', ventral aorta; ac ) carotid arteries ; v, superior cava ; 



vc, inferior cava ; vp, pulmonary vein. 



