742 



SOLIPEDA. 



Fie. 516. 



Brain of the Horse, showing the Convolutions. 

 Fig. 517. 



Base of the Brain of the Horse, showing the origin of 

 the Cerebral Nerves. 



ORGANS OF GENERATION. Male Generative 

 Organs. The external organs of generation 

 in the male solipeds are remarkable for their 

 great development, and in nearly equal pro- 

 portion are these animals conspicuous for 

 their vigorous and fruitftd generative powers, 

 which, however, are only called into full ac- 

 tivity at a certain season of the year, namely, 

 in this climate, from the beginning of April till 



the latter end of June, during which period 

 he will efficiently serve fifteen or eighteen 

 mares. 



The scrotum is suspended between the 

 thighs at a distance of about nine inches be- 

 neath the anus, whence it is prolonged for- 

 wards, to terminate in the prepuce (#g. 518. 



*,/, *) 



The penis (Jig. 518. b, c, d) is full a foot in 

 length even in its undistended state, measur- 

 ing from the bifurcation of the corpora caver- 

 nosa (6) to the extremity of the glans (c), 

 which latter organ is itself nearly half a foot 

 in length, and four inches in circumference ; 

 its shape is cylindrical, and it is covered with 

 a soft and smooth skin. 



Fig. 518. 



Organs of generation of the Stallion. 

 (After Daubenton.) 



a, the scrotum ; ft, c, d, the penis ; e, the prepuce ; 

 /, /, the rudimentary mammae ; g, the left testicle 

 removed from the scrotum ; h, the epididymus ; i, k, 

 the upper margin of the testis ; /, m, vas deferens ; n, 

 vas deferens from the opposite side ; o, o, enlarge- 

 ments of the vas deferens, before their termination; 

 p, q, tendinous bands derived from the root of the 

 tail, these, after embracing the end of the rectum, r, 

 run along the penis, s, as far as the prepuce, t, where 

 they terminate; v, the urinary bladder ; x, x, vesiculae 

 seniinales ; y, y, Cowper's glands. 



The testicles (one of which only (g) is repre- 

 sented in the figure) are of an ovoid flattened 

 form, each being about three inches long by 

 two inches broad, and one inch and a half 

 thick : the epididymus (//) issues from its 

 anterior part, and is composed of large tubes 

 of a yellowish colour, bound up together in 



