384 THE ANATOMY OF VEnTEBRATED AXDIALS. 



The TupaycB are soft-furred, long-tailed, tree-loving ani- 

 mals, with complete bony orbits and a large cacum, and are 

 those Insectivora whici most nearly approach the Lemurs. 



The Shrews (Sorices) most nearly resemble Rodents out- 

 wardly, being very like small mice. The zygoma is imperfect, 

 the tibia and fibula are anchylosed, and the pubic bones do not 

 meet in tlie symphj'sis. There are sixteen to twenty teeth in 

 the upper jaw and twelve in the mandible. Canines are 

 absent, and there are six incisors above and four below. The 

 inner lower incisors are greatly elongated and proclivous, and 

 some of the teeth not unfrequently become anchylosed with 

 the jaws. There is no caecum, and peculiar musk-glands are 

 sometimes developed at the sides of the body. 



The Moles ( Talpince) have no external ears, and the eyes 

 are rudimentary. The fore-limbs are much larger than the 

 hind, and are inclosed within the integument up to ihe carpus. 

 The palmar surface of the broad manus is turned outward and 

 backward. 



FiQ. 199.— The skeleton of a Flylug-Fo.'! (Pterop}ia). 



The manubrium of the sternum is very broad, and its ven- 

 tral surface gives rise to a strong median crest. The scapula 

 is as long as the humerus and the radius together. It is tri- 

 quetral and possesses an acromial process, but no distinct cor 



