1908. 



ANTECHINOMYS AND OTHER MARSUPIALS. 



587 



both sides by a membrane with a free edge. On the one side, 

 the membrane has a clearly marked perfectly straight edge, and 

 traced up to the beginning of the loop this is seen to be 

 continuous with the great omentum. The omentum is thus 

 attached to the whole of the ansa coli. On the other side is an 

 equally free fold of membrane, but here the membrane has not 

 a clear cut edge. It ends raggedly and unequally as is shown 

 in the figin^e. I should say that the figure is made without 

 any cutting of the membranes, which preserve the condition 

 they showed while the gut lay undisturbed within the abdominal 

 cavity. I take it that the ragged edge is really the actual free 

 edge of the omentum, which does not therefore actually end upon 

 the ansa coli but is continued beyond it. 



Text-fig. 118. 



Part of alimentaiy tract oi Ht/drocJicerus capyhara. 



a.c.d. Ansi coli dextra. Coe. Ca3cum, cut througli at about the middle of its 

 course. O. Omentum. St. l>tomacli. 



Although Grant * and Martin t as well as Tullberg have 

 described the gut of the Paca, Ccelogenys paca., I think it worth 



* Trans. Wern. Soc. loc. cit. 



t P.Z.S. 1838, p. 54. 



