SUS SCROFA. 123 



in position. The suprarenal capsules are little oblong bodies lying 

 between the spine and upper end of kidney. 



All the abdominal viscera are much more adhering to the parietes of 

 the abdomen than they generally are in any other animal, as far as I 

 know, excepting the human. 



The bladder is prominent and loose, only connected by its neck, and 

 by a sort of mesentery, to the lower part of the abdominal muscles and 

 pubis : it is but thin in its coats. The membranous part of the urethra 

 is long and muscular externally ; it is very vascular upon the inside and 

 full of little points. 



There are two prostates l , which are not in contact with the bladder, 

 but seem to be reflected and in contact with the membranous part of 

 the urethra. There is a foramen caecum in the urethra just at the 

 termination of the membranous part of the urethra, which is perhaps 

 for the entrance of the ducts of two glandular bodies, oblong in figure, 

 lying in contact with the membranous part of the urethra near the bidb. 



The penis is long and enclosed in a sheath, which is covered by the 

 common integument, like that of a bull, ram, &c, and lies in a ser- 

 pentine course when not erect : it has a pair of muscles arising from 

 the hollow of the sacrum, passing by the side of the rectum, round the 

 bidb of the urethra, and then along the urethra its whole length, like 

 what we find in many other animals. The spongy part of the urethra 

 seems to be nothing more than two veins running its whole length 2 . 



The testicles lie pretty near the anus, and have no scrotum ; that is, 

 there is not a bag as in some other animals : they have the corpora 

 pyramidalia, but they are situated out of the abdomen. The tunica 

 vaginalis communicates with the abdomen. The vasa deferentia are 

 united together behind the bladder by a thin membrane, which becomes 

 pretty thick at its edge. They seem to have no vesiculse seminales 3 . 



The thorax is a good deal like that in other quadrupeds, only the 

 heart is broader, flatter, and sharper, more of the shape of the human 

 heart, but flatter still. 



The pericardium differs from that in other animals by adhering by a 

 pretty broad surface to the sternum, so that there is no mediastinum 

 excepting at the upper part, at the thymus gland. 



The lungs are as in other quadrupeds. Their inferior lobes are at- 

 tached to the posterior mediastinum by a thin membrane. 



The oesophagus, after having got clear of the vessels of the heart, 



1 [These are the homologues of Cowper's glands : see Hunt. Preps. Nos. 2537, 2540.] 



2 [lb. Nos. 2541—2543.] 



3 [See, however, the notes on a previous dissection of a boar, p. 119; and Hunt. 

 Prep. No. 2540. The female organs are shown in Nos. 3529 — 3537-] 



