20G 



sertion of the ureters with a note of admiration ; and I am not 

 aware that a parallel structure has since been discovered iii any 

 animal possessing an urinary bladder. It is not, however, precisely 

 in the jfundiis or sumrnit of tlie bladder that the ureters open ; they 

 enter between the muscular fibres at the back part o^ ihefundus, at 

 the angles, analogous to the situation atvvhich the tubcs FallopiancB 

 enter the human uterus ; but they run obliquely downwards and 

 invvards for 2 lines before they terminale, leaving, however, a full 

 inch of space between them and the orifice of the urethra. The 

 long diameter of the distended bladder is 1 inch 4 lines. For 

 vvhat purpose this structure is designed in the Hyrax, or whether 

 the urine undergoes any change in conseąuence of it, I cannot 

 conjecture ; but it is a curious fact, that, according to Hemprich, 

 both the nativės of Arabia, and the boors of the Cape, regard the 

 urine of Hyrax as medicinai. 



" In accordance with the length of the loins in Hyrax, (a circum* 

 stance which Cuvier particularly notices,) the parts in relation with 

 that region seem peculiarly elongated. The muscular part of the 

 urethra is a full iiich in length, and the vesiculce seminnles, opening 

 into the termination of this part, lie on either side of it, so that their 

 apices only reach the bladder. The vasa dejvrentia also are much 

 longer than is usuaily seen in the true Testiconda, the testes being 

 situated just below the kidneys, 3 inches anterior to the bladder. 

 Palias has accurately described their form and situation, and also 

 the course of the vasa deferentia, and the convoluted mass, likę a 

 second epididymis, behind the bladder. They terminate distinctly 

 from tlie ducts of the vesiculiE seminales, beneath a valvular fold of 

 the inner membrane of the urethra, at the termination of the mus- 

 cular part of that canal. These vasa deferentia are remarkably at- 

 tenuated, as in all Testiconda, before they reach the bladder; they 

 then begin to enlarge, and by means of their convolutions, mušt 

 form a considerable receptacle for the semen. Yet here the vesicula 

 seminales are as large and complex, proportionaily, as in the Boar, 

 a circumstance which seems to afford a strong additional argument 

 to those advanced by Tyson (Fhil. Trans., xiii. p. 370,) and Hunter 

 (Anim. CEcon., p. 31,) against their supposed use as mere recep- 

 tacles. 



" These vesiculte seminales vvere situated on either side the mus- 

 cular part of the tirethra ; not behind the bladder, but in the space 

 betneen it and the bulb of the urethra. They were each 1^ inch in 

 length, and 8 lines in breadth, giving ofF a number of short wide 

 processes, which, as they are compacted together, give to the ex- 

 ternal surface a brain-like appearance. Their ducts are wide, and 

 terminate behind the valvular fold at the end of the muscular part 

 of the urethra. 



" Two prostate glands, of a tubular structure, lie at the lower 

 ends of the vesicula; seminales. 



" The bulb of the urethra commences by a wide culde-sac : the 

 spongy part of the urethra, vvhich forms its parietės, is 2 lines in 

 thickness, and this is embraced by acceleratores of remarkable 



