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Show 1870.] ANATOMY OF THE PRONGBUCK. 351 Agreeing with Antelopes, but differing from Deer, there is in the Prongbuck a small pyriform gall-bladder (Gb), which lies upon the surface of the right lobe, rather to the left of its middle, but not reaching the upper margin. The cystic duct, an inch long, joins the right hepatic; and almost immediately after, these turn off at a right angle, the left hepatic duct joining to form the ductus communis choledochus (d. ch), which is fully an inch long, and penetrates the duodenum at 5 inches from the pylorus. The vena cava (Fe), of moderate calibre, passes, as usual, along the inferior or attached margin of the liver. As compared with Oris, the hepatic structures of Antilocapra differ in being relatively thinner and smaller, in the greater length of the caudate lobe (which in the Sheep does not overlap the right margin), in the diminished capacity of the gall-bladder, its median position on the right lobe, and its not reaching the free margin. The Chamois's liver stands a remove further from the Prongbuck. In it the left lobe, and not the right, has the greatest magnitude. The mesial marginal fissure dividing these is wide and deep ; the gallbladder is very capacious, and reaches considerably beyond the outer border, partially within the fissure ; the caudate lobe is short and thick. 8. PARTS CONNECTED WITH GENERATION. The surface of the kidneys are smooth ; their figure bean-shaped, but rather roundish than flattened ; length fully 2| inches. The hilus ends in a deep and long sinus, subdividing into fine calyces. The pyramids of Malphigi are rounded, and half a dozen in number ; the cortical substance is 0*2 inch thick. The ureters (u, fig. 5) penetrate the under surface of the wall of the urinary bladder at the commencement of the neck and outside the vasa deferens. On reaching rather beyond the middle of the base of the bladder, the vasa deferentia (V.d.) enlarge, approach, and lie alongside each other in the median line, closely invested by a dense areolar sheath. They proceed, adherent, and like a single flattened tube, on the neck of the bladder, towards and between the lobes of the prostate. The bilobed prostate gland (Pr.) lies on the under surface, and at the proximal end of the membranous portion of the urethra. Each flattish, bean-like lobe is half an inch long ; and the two, by their position, form a compressed horseshoe figure, fully half an inch wide, embracing the terminal portion of the vasa deferentia. I have preferred to term the bodies above described glandulse prostaticae, though perfectly aware they have been regarded, by such a competent authority as Rudolph Leuckart, as vesiculee seminales in other ruminants. Leuckart's very able article, " Vesicula prostatica," in the ' Cyclopaedia of Anatomy and Physiology,' vol. iv., is immediately followed by a clearly reasoned paper by my old friend S. R. Pittard, on the " Vesicula1 seminales ;" and I abide by his |
