194 



DR. P. CHALMERS MITCHELL ON THE 



expanded proximal poi^tion of the hind-gut, and the csecum lies 

 on the outer side of the curve at the point of junction. The iirst 

 portion of the expanded colon runs up towards the dorsal line, 

 then follows a large colic loop (C.L. 1), and finally a rectal portion 

 of smaller calibre, thrown into rather regularly disposed minor 

 loops (C.L. 2). A secondary connection forms a CEecal ligament 

 attaching the caecum to the small intestine and to the duodenal 

 region. Another secondary connection forms a strong colioo- 

 duodenal ligament, attaching the colic loop to the duodenal 

 region. The latter was severed to make it possible to lay out 

 the gut so as to display its pattern. 



The peculiar caecum of the Wombat has been described and 

 figured by Owen (Owen, 1868, p. 417, fig. 315) and by Flower 



Text- figure 7. 



Junction of the small intestine, csecum, and liind-gut in Phascolomys mitchelli. 



lie. Cut end of ileum. Col. Cut end of colic loop. V. Vermiform appendage. 

 C. Csecal pouch at the proximal end of hind-gut. Part of the wall of the 

 hind-gut has been removed to show the apertures of the ileum and of the 

 vermiform appendage on a raised projection. X. Beginning of the solid part 

 of the appendage. 



(Flower, 1872, p. 647), and Flower's figure has been reproduced 

 by Oppel (Oppel, 1897, p. 567). Owen's figure corresponds 

 exactly with the portion of text -fig. 6 marked C, but it has been 

 drawn from the other side of the gut (the right side). Flower's 

 figure has obviously been drawn from a mounted preparation ; it 

 also shows the right side, but it has been turned upside down. 

 It is on a larger scale, and pai-t of the side-wall has been 

 removed to display the mode of jvmction of the caecum with the 

 small intestine and the hind-gut. As Flower's figure is in a 

 publication that is not now readily accessible, I reproduce as 

 text-fig. 7 a drawing from my own dissections. It will be seen 



