94 



MORPHOLOGICAL TYPES 



present, opening into the mouth. The glottis lies on the floor 

 of the pharynx and leads to the windpipe. The stomach is 

 typical and the intestine makes a few loops before leading to the 



Fig. 46. — Triton : dissection of female seen from the ventral side. 

 b, bladder ; b d, bile-duct ; ca, carotid arch ; cl, cloaca ; da, dorsal 

 aorta; gb, gall-bladder; h, heart; i, intestine ; k, mesonephric kidney; 

 /, liver ; In, lung ; Md, Miillerian duct ; o, ovary ; p, pharynx ; pn, pan- 

 creas ; r, rectum ; s, stomach ; sa, systemic arch ; sp, spleen ; Wd, Wolffian 

 duct. 



rectum, which opens into the cloaca. Ventral to the rectum 

 is a sac which is formed as an outgrowth from it, the bladder. 

 This sac is of great importance in the evolution of the higher 



