MALE ORGANS OF AKTIODACTYLA. 



f>67 



524 



the terminal duct opens beyond a transverse valvular fold sepa- 

 rating the bulbous from the muscular part of the urethral canal. 

 The penis shows a sigmoid flexure^ and has a pair of' retractores,' 

 arising from the hollow of the caudal end of the sacrum, and 

 inserted at the end of 

 the bend next the o-lans. 



<D 



This is triquetral, elon- 

 gate and pointed. The 

 spongy part of the ure- 

 thra, between glans and 

 bulb, is reduced to a 

 few veins. The prepu- 

 tial opening is near the 

 navel. 



The Ruminant Artio- 

 dactyles are devoid of 

 vesicular glands ; their 



o ' 



testes pass into a ped- 

 unculate scrotum. The 



. . ^ Su-i>fiisory ligament* and muscles of penis, Hor.e. 



spermatic arteries torm, 



by their close and numerous convolutions, a plexiform mass, which 

 is specially notable in the Bull. The vasa deferentia slightly en- 

 large at their termination in the Camel, but are not there different 

 in structure from the rest of the sperm-ducts : they terminate 

 upon a broad wrinkled verumontanum. The prostate is a trans- 

 A'ersely oblong compact body with a smooth exterior, the secre- 

 tion passes by several orifices into the depressions at the 

 sides of the verumoutanum. Cowper's glands are of moderate 

 size, subcircular, compact in structure, with a thick muscular 

 capsule. The corpus spongiosum commences by a plexus of 

 veins affecting a parallel course around the membranous part of 

 the urethra, but convolute in diverse directions to form the bul- 

 bous expansion ; advancing from which the veins become reduced 

 to two or three in number, running parallel with each other and 

 the urethra. The cavernous part of the penis forms a slender 

 cylinder, it extends forward beneath the linea alba, closely con- 

 nected therewith, making a ridge along that part of the abdo- 

 minal surface ; then becoming free and receiving a reflected 

 covering of skin, or ' prepuce,' anterior to which usually depends 

 a tuft of hair. The glans, in the Camel, is long, pointed, with 

 its apex continued beyond the urethral opening and bent back. 



In the Goat, fig. 525, the dilated terminal parts of the sperm- 

 ducts, a, a, have a glandular thickening of the inner tunic. The 



