102 CARNIVORA. 



animal's being young, I do not know. The testicles lay between the 

 upper part of the legs and os pubis, and as if they had come through the 

 ligament [of the abdominal ring], for there is a similar ligament to that 

 arising from the knee and inserted into the pubis. There is a tunica 

 vaginalis communis. The vasa deferentia lead into the pelvis behind 

 the bladder as in common, and enter much as in the human. There is 

 a thin prostate, but no vesiculae seminales. The urinary bladder is pen- 

 dulous, as in other animals 1 . The crura penis are short, and closely 

 connected to the pubis ; the corpus cavern osum is short, not reckoning 

 the bone of penis : the bulb is pretty large ; the glans covers the bone of 

 the penis. 



The muscular parts of the rectum and its posterior surface arise from 

 the under surface of the tail. There are no bags at the anus. 



Of a Sea Cow in a fetal state [Trichecus rosmarus, Linn. 3 ]. 



The stomach has little or no great end. The duodenum passes much 

 as in the human, only lower down. The caecum is as in the seal, and 

 lies exactly before the spine. The pancreas, two ; the descending a 

 pretty large one. The liver divided into lobes, besides the lobulus 

 Spigelii : the second from the left has a large fissure passing all along 

 the upper surface to the diaphragm in which is the falciform ligament, 

 which fissure at the lower surface of the liver is divided into two : in the 

 left division is the ligamentum rotundum ; in the right is the gall- 

 bladder. This fissure may be said to divide this lobe into two ; there- 

 fore this animal has six lobes besides the lobulus Spigelii. 



The lungs on the right divided into two ; the lower lobe divided at 

 the anterior edge, and sends in the lobe above the diaphragm. On the 

 left side are two lobes, serrated on the anterior edge, and the posterior 

 thick part has one fissure in it. This plan of serrating is for the motion 

 of the anterior part of the chest. The kidneys are conglomerated 3 . 



I should very much suspect this to be the sea cow, but more pro- 

 bably a seal ; for the stomach, caecum, and liver are more that of a car- 

 nivorous animal 4 . 



In comparing the above description with one sent me from St. 

 John's Island, which was a foetus, and above 4 feet long, they agreed 

 perfectly, excepting in the caecum. The caecum of the animal from St. 



1 [The kidney of the Phoca vitulina is No. 1207, Hunt. Physiol. Series.] 



2 [A foetus of a walrus, which has been dissected, is No. 3729, Physiol. Series. 

 Huuter appears subsequently to hare received Nos. 2559, 2560, 2561.] 



3 [Hunt. Preps. Nos. 1264. 1265.] 



4 [Such is the structure of those parts in Trichecus.'] 



