Some Account of the Dii gong. 343 



Body rounded, diminishing to the tail, and without any vestige 

 of dorsal or ventral fins. The place of the anterior extremities 

 is supplied by fins, which offer no appearance of nails, but are 

 somewhat verrucose on their anterior margin. They are thick 

 and fleshy, and neither from their form nor size capable of 

 supporting or assisting the animal out of the water. 



Tail broad, horizontal, and of a crescent or semilunar form. 



Dissection. 



Skin three quarters of an inch thick, with little adipose matter, 

 and yielding no oil. 



The cavity of the abdomen large. 



The stomach is large; and the relative position of the cardiac 

 and pyloric orifices is nearly as in the human subject. It has 

 two appendages, which open into it near the junction of the 

 duodenum. Membrane of the stomach thick, internal surface 

 smooth, and not corrugated into plicae. The stomach and its 

 appendages were distended with fucus or sea-weed, but little 

 masticated or altered. Intestinal canal long. vSmall intestines 

 tmiform. Caecum very large, somewhat curved, and contain- 

 ing a portion of i)artially digested sea- weed. Colon exceeding 

 the small intestines in diauieter by one third, very uniform, 

 and with few or no contractions. Liver of moderate size, 

 consisting of two large and distinct lobes, connected by a 

 smaller one somewhat tongue-shaped, and a fourth which was 

 very small, on the posterior side. Gall bladder little distended, 

 and situated beneath the third and tongue-shaped lobe. Spleen 

 very small, not exceeding three inches long and one inch 

 thick, attached to the left side of the stomach. Pancreas 

 l>ing below the duodenum. Kidneys in their usual place, and 

 large. Bladder much contracted, not exceeding the size of 

 an eg%, but from the thickness of its coats is probably capa- 

 ble of much greater distension. 



Testicles situated a little below the kidneys, egg-shaped, flat- 

 tened, partly embraced by a very perceptible epididymis. 



Penis large ; while collapsed entirely coiicealcd within the pre- 

 puce. The glans consists of two lobes, separated or cloven 

 above, in such a manner as to give the whole the appearance 

 of the cloven foot of a ruminating animal. The uiethra opens 

 on a small tubercle or papilla between the lobes of the glans. 



In the thorax, the thymus gland is particularly large, black and 

 friable under the fingers, and occupying the space between the 

 folds of the mediastimnn. 



Lungs two, distinct, of an elongated form, not lobulated, and 

 situated |)ostcriorly, one on each side; their substance of the 



usual 



