864 



DR. C. F. SONNTAG ON THE V'ISCKRAL ANATOMY 



three-quai'ter inches long. It is longer and thinner than that of 

 Peragah lagotis figured by Chahiaers Mitchell (6), and it has a 

 mesentery whereas that of P. lagotis has not. In other respects 

 the intestinal tracts of these Peramelidte are similar. Their 

 cjeca differ from the minute conical appendage of Goenolestes 

 ohscurus as figured by Osgood (9), and the latter is devoid of a 

 mesentery. 



Text-figure 76. 



A. Csecum of Metachirvs opossum ; B. caecum of Perameles ohesula ; C-F. aortic 

 ai-clies with innominate (lA), right subclavian (a), right common carotid (6), 

 left common carotid (c) and left subclavian {d) arteries ; G-.T. the spleens of 

 the Marsupials (names in text). 



The ligament running backwards from the duodenum in 

 Peraoneles ohesula crosses the front of the rectum and fuses with 

 the splenic ligament. They enclose a pocket containing the 

 rectum, and a probe passed into it runs backwards into the 

 pelvis. 



The intestinal tract of my nearly adult female Dendrolagus 

 ursinus differs in several respects from that of a young specimen 

 described by Chalmers Mitchell (7). The duodenal loop is sharply 

 differentiated, but runs insensibly into Meckel's Tract. The coils 

 of Meckel's Tract do not form a double spiral, and there is only 



