Ill 
and Structure of the Proteas Anguinus. 
bristle ; h , the left ovarium , containing minute ova, and 
drawn to one side to display the kidney underneath ; c, a 
portion of the oviduct straitened by the action of the spirits; 
d , the left kidney ; e, the ureter running along its margin, 
and terminating with the oviduct in the rectum ; f a por- 
tion of the left air-bladder, in this instance remarkably en- 
larged ; the corresponding one of the right side was very 
small. 
Plate VI. Fig. 4. The cranium laid open, to shew the cerebral 
mass and certain nerves springing from it ; a a, the two hemi- 
spheres of the cerebrum ; h , the cerebellum ; c , the medulla 
oblongata ; d, the right olfactory nerve ; e, the origin of the 
fifth pair of nerves ; f, the vestibule of the organ of hearing 
laid open, in which the little sac is seen, and the origin of 
the acoustic nerves ; g , the facial nerve ; h , the entrance of 
the carotid into the cranium, from which springs the opthal- 
mic going to the eye ( n ) ; m, the origin of the par vagum. 
Plate VI, Fig. 5. Profile of the head and part of the trunk ; 
a , the external aperture of the nostrils surrounded by pores ; 
h , the doubling of the inferior lip, which is in part covered 
by the superior ; c, the swelling or protuberance produced 
by the heart, 
Plate VII. Fig. 1. A male proteus laid open, to exhibit the re- 
lative size and position of the viscera ; a , the heart, with 
its pericardium, opened and turned back ; hhb, the liver 
drawn aside, to shew the viscera beneath it ; c, the stomach ; 
d , the alimentary canal ; e, the spleen ; f, the pancreas ; 
g, the testicle of the left side ; h , a part of the left kidney ; 
i, the urinary-bladder ; &, the left air-bladder, with its tube, 
opening into the conical cavity above ; I, the anus or cloaca ; 
m, the sinus of the vena cava. 
Plate VII. Fig. 2. a , the heart reversed and turned upward ; 
5, the short conical canal cut longitudinally, which commu- 
nicates anteriorly with the glottis, and posteriorly with the 
cavity from which the two tubes, (cc) terminating in the 
air-bladder, proceed, 
Plate VII. Fig. 3. Head of the proteus viewed from below, eight 
times greater than natural, displaying the circulating and res- 
piratory systems ; a 9 the heart ; h , the arterious trunk spring-. 
