68 Mammalia. Digestive System, 



blood not only from the Spleen, but also from the Pancreas, 

 the Duodenum, the greater part of the Stomach and Omen- 

 tum, the descending Colon, and part of the Rectum. 



The Pancreas lies a little dorsad* of the stomach, and between 

 the Spleen and the Duodenum : it is commonly divided into 

 two lobes, though occasionally it is tri-lobed : it may have one 

 or two excretory ducts ; when the duct is single it usually 

 joins that from the Liver before reaching the Intestine ; if a 

 second duct is present it enters the Duodenum by itself. 



DIGESTIVE SYSTEM. Special. 



1. Month. 



Not always terminal. 



A rostral production sometimes makes the oral opening sub-ter- 

 minal, or inferior {e.g. Sorex, Elephas, Tapirus). Ornithorhyncus 

 is provided with a mouth nearly resembling the flat and sensitive 

 bill of the Aves Chenomorphaj. 



2. Lips. 



J^ot always presetit. 



Cete. In the Delphinidae they are barely represented. 



Monotremata. They are manifest at the suckling period only. 



Modified for prehension or uprooting. 



In animals that feed on succulent and luxuriant herbage, the Lips 

 are capacious, strong, and pendulous, for the purpose of grasping 

 and detaching their food. 



JProloscidia. The under lip alone is free : the upper lip blends 

 with the nose, and is with it produced into an elongated cone, 

 moveable in every direction, and terminated by a thumb-like ap- 

 pendage, endowed with exquisite sensibility, and capable of picking 

 up the smallest objects, {cf. Organs oi Sense, !N^ose.) 



Ferissodaetyla. The Multungulate Tapir has a similar arrange- 

 ment to that found in the Elephant. 



* .tf._bet-weeii the Stomach and the Vertebral Column. 



