viil 
Brain: « « 4 = & a wes 
Brain of cyclostomes 
Brain of elasmobranchs 
Brain of teleostomes . 
Brain of dipnoi. . . 
Brain of amphibia 
Brain of reptiles 
Brain of birds. . . 
CONTENTS. 
Brain of mammals. . . 
Peripheral nervous system 
Spinal nerves. . 
Sympathetic system . . . 
Cranial nerves 
Sensory organs j 
Nerve-end apparatus. 
Lateral line organs * 
Auditory organs. . 
Organs of taste . . 
Olfactory organs 
Eyes... . 
Digestive organs 
Oral cavity 
Teeth . 
Tongue ee 
Oral glands. . . 
Pharynx 
Csophagus 
Stomach . 
Intestine . . 
Liver 
Pancreas. . 
Respiratory organs 
Gills (branchiz) 
Pharyngeal derivatives. . . 
Swim bladder 
Lungs and air ducts 
Air ducts 
Lungs . 
Accessory respiratory structures . 
Organs of circulation 
Blood and lymph . 
Blood-vascular system . 
Embryonic circulation 
‘Heart . . 
Arteries... 
Veins 
