278 RAPTORES. 



each side of it. From the termination of this last, which is close to the 

 back, the gut passes down the back and forms the rectum. The caeca 

 are pretty long. The rectum becomes very large at the anus [the cloaca] : 

 there is a cavity above the anus [bursa Fabricii] which communicates 

 with it. 



The liver has two equal lobes. The gall-bladder lies between the 

 two, rather to the right. The ductus hepaticus enters the last turn of 

 the duodenum : the cystic enters near the same place, but farther on. 

 The pancreases are two, one on each side of the [duodenal] mesentery : 

 there are two ducts ; the first enters the last fold of the duodenum, half- 

 way between the first and second turn ; the second enters near the last 

 turn, about an inch before the hepatic duct. 



The small intestines are connected together by loose thin membranes, 

 which are obliged to be divided before they can be unravelled. There 

 were yellow stones in the rectum at the amis. The testes were pretty 

 large. No vein enters the liver at the edge, as in the swan. There 

 were muscles on the tarsal bone. 



The membrana nictitans in a horn-owl comes from above downward 

 over the eye. The eye of this bird is almost directed forwards. 

 The vitreous humour has a capsula 1 . 



The Great Horned Owl [Bubo maximus, Sibbald]. 



The duodenum is as usual [in birds of prey] : the jejunum passes 

 back, and then becomes loose ; but not at equal distances from the root 

 of the mesoduodenum, for it is scolloped, making folds, the last of 

 which is nearly as long as that of the duodenum : it then ends in the 

 rectum. The rectum is very large, and was filled with a fluid. The 

 caeca are nearly as long as the last turn of the ileum, and are about as 

 thick, excepting at their opening into the rectum. The length of all 

 the intestines was 2 feet 7 inches. 



The kidneys are shorter than in other birds ; their upper ends are 

 thick and globular, projecting forwards, appearing like the kidneys of 

 [mammalian] animals. 



The testes were about so large ■ , but the right rather less. 



They are of a pale yellow colour. There are two penises, as in the 

 common cock, but they are somewhat larger ; and seem to be bifid, 

 with one point short. That part of the anus between the two penises, 

 with the edge of the valvular part of the anus, is something different 

 from the rest, enclosed by two small ridges, one from each penis to the 

 edge of the valvular part, converging as they pass, and terminating in 



1 [Hunt. Prep. No. 1799. The organ of hearing is No. 1581.] 



