546 



DE. J. MUEIE ON THE ANATOMY OF THE SEA-LION. 



in this case occupying a volume, one might almost say, greater than the glandular hepatic 

 organ itself. As I have shown in Trichechus, there is a mid septum interiorly, with a 

 free opening, however, between ; and each sac has diverticular pouches in communica- 

 tion with the various segments of the much divided liver. The capacity of the two 

 chambers is such that, on being injected, I was utterly astonished and confounded as to 

 where the material was being sent to. Subjoined is the memorandum taken when at 

 work ; and the drawings, figs. 48 and 72, supplant lengthened description. 



"Hepatic sinuses 14 inches across in a straight line; that of the right side alone is 

 8 inches, interspace 1 inch ; hence left, above, 5 inches long. There is a deep and wide 

 fissure behind; and each from this view is semilunar or stomach-shaped, the cardiac 

 and pyloric curvatures being represented by the veins that enter the different lobes of 

 the segmented liver. In front, i. e. below, there is scarcely any fissure ; but a strong 

 white fibrous band, an inch broad, runs up the middle, being derived from, or a dupli- 

 cature of the abdominal surface of the diaphgram. Circumference of right half when 

 distended 11 inches, the left being half an inch less." 



The hepatic plexus of nerves lies beneath the portal trunks ; and twigs of these ramify 

 around the vein while being sent to the numerous hepatic lobes. Minute branches of 

 nerves are also derived from the hepatic plexus, which accompany the bile-ducts, and 

 lie superficial to the portal vein, and even to the arterial trunks. 



Fis. 4. 



Diagram of the Kenal Vessels, &c. 



K,K*. Kidneys. u,u*. Ureters, cut short. Ao. Aorta. 

 M.a. Left renal artery ; the dotted line shows 

 position of the right, behind cava. R.v, R.v. 

 Renal veins. V.c.a. Vena cava ascendens. Sc, Sc*. 

 Suprarenal capsules or Glands. 



V. Hyolaeyngeal and Pulmonary Systems. 



1. Components of Hyoid and Larynx. 



a. Hyoid arch. — This arch is built up of nine osseous and four cartilaginous elements. 

 A taper pointed cartilage 0-4 inch long articulates the arch with the tympanohyal of the 

 skull. The stylohyals united with these cartilages are subcompressed, digit-shaped 

 bones, each 1-2 inch long, and with a knobbed extremity distad from the skull. These 



