152 Transactions. — Zoology. 



a thick hard Hning within. The latter, as is frequently the 

 case, is continued beyond the thick muscular wall into what 

 appears externally to be the commencement of the intestine. 



The intestine measures 48 in. from the pylorus to the point 

 of entrance into the cloaca, from which it had been cut by the 

 taxidermist. The loop of the duodenum measures 5^ in., and 

 has a diameter of f in., the remainder of the gut being slightly 

 narrower. The intestine beyond the duodenal loop is thrown 

 into two large and two smaller U-shaped coils, as in the Ballidcs 

 generally. Unfortunately, I was unable to map these out 

 with absolute accuracy in the manner in which Mr. Chalmers 

 Mitchall has done for a series of birds,''' as the mesentery had 

 been injured before I examined the viscera, but I have repre- 

 sented them in what appears to be their natural position ; but 

 it is needless to describe their arrangement in the present 

 paper. I would refer tbose interested in the matter to my 

 forthcoming paper in the " Proceedings of the Zoological 

 Society." 



There is a vestige of the vitelline duct, about ^ in. in length, 

 at a distance of 24 in. from the gizzard — in other words, at a 

 point half-way along the intestine, at the apex of the second 

 post-duodenal loop. The paired caeca are of considerable 

 length, measuring 9 in. They arise at a point 6 in. from the 

 hinder end of the gut. Each cgecum has the normal shape and 

 arrangement, commencing as a narrow tube and dilating 

 gradually to form a thin-walled terminal sac. 



The liver has, as usual, its right lobe larger than the left. 

 The gall-bladder is entirely free from the liver. 



There are two bile-ducts, as is generally the case in birds. 

 One of these, since it arises directly from the left lobe of the 

 liver, is known as the " ductus hepato-entericus,"or "hepatic 

 duct," to distinguish it from the "cystic duct," or " ductus 

 cystico-entericus," which is connected with the gall-bladder. 

 This latter duct (PI. XIII. fig. c.cl.) runs down the mesentery 

 alongside the distal limb of the duodenum, into which it 

 opens on its dorsal surface close to the apex of the loop. 

 The other, or direct hepatic duct, passes along the middle of 

 the mesentery, to open ventrally mto the gut close to the 

 former. 



The pancrea.s presents three lobes or regions. The basal 

 lobe is brownish in colour and less compact than the other 

 two, which ai'e yellow (PI. XIII. fig. ^;.&.). It lies adherent 

 to the duodenal mesentery throughout ; on its ventral surface 

 it carries the ventral lobe, which extends beyond the basal 

 lobe forwards to form a finger-shaped process projecting freely 

 from the mesentery, and backwards forms a rounded, broader 



* Proc. Zool. Soc, 1896, p. 136. 



