370 TYPES OF ANIMAL LIFE 



The tail is prehensile, and is probably made use of as an 

 additional support while feeding. It is said to have only 

 a single young one at a time, and my own observation 

 confiiTQS this statement, for I once shot a female with a 

 very small blind and naked little creature clinging closely 

 to its breast, which was very much wrinkled, reminding 

 me of the young marsupials. The fur of the back- and 

 limbs is short but exquisitely soft." 



With the colugo we close our notice of the Insectivora 

 and of all existing beasts, but before we conclude a word 

 must be said with respect to some fossil forms. The 

 Eocene rocks of North America and Europe have dis- 

 closed relics of the jaws and teeth of creatures which 

 show signs of relationship to the insectivora on the one 

 hand, and to the pouched beasts or marsupials on the 

 other. The same relationships are also suggested by 

 the jaws and teeth of small creatures, which have 

 been found in secondary rocks, the Jurassic formation 

 of the United States and of England. Mammalian 

 remains have also been quite recently discovered in the 

 chalk. 



It, is time now to present in a tabular form an enumer- 

 ation of all the ordinal groups of existing mammals. They 

 may be set down as follows : 



CLASS MAMMALIA. 



