Digestive System Special. 9-") 



all Cete; 



and some In-Unamellata. [Bradypus ^rf'dactylus has no gallbladder, 

 though Bradypus fMactylus is possessed of one.] 



is generally present 



in all the other Orders ; and in most genera of the Cheiroptera, 

 llodentia, Artiodactyla, and In-Enamellata, with the exception of 

 those noted above. 



In the Insectivora it is for the most part of considerable size. 



In the Sectorialia the inner surface of tlie gall bladder is minutely 

 rugous and villous. In some Seals {e.g. Otaria) the ductus commu- 

 nis, after it is joined by the pancreatic duct, terminates in a dilated 

 sacculus, within the duodenal coats. 



In all Cmicornua (Artiodactyla) a gall bladder is present. 



Of the In-Enamellata^ the gall bladder is present in Bradypus 

 didactylus, and all DasypodidaD. In Orycteropus two separate gall 

 bladders are found. 



All MarsupiaUa and Monotremata have a gall bladder. 



22. The Pancreas 



is Iranched, or dendritic, 



in several species of JRodentia and MarsupiaUa. 



has a single duct, yet entering alone, 



in most Rodentia, where it enters the duodenum lower down than 

 the bile-duct ; and 



in the Monotrematous Echidna, where it enters the duodenum, 

 between the bile duct and the pylorus. 



