KEY TO JNDIANA MAMMALS. 



447 



L. Color yellowish gray; claws very long. 

 (Badger.) Genus Taxidea, p. 577 

 LL. Color brown (in some species white in 

 winter). 



M. Body stout with legs and tail short; 

 foot plantigrade, as in bears. 

 (Wolverine, not now found in the 

 state.) Genus Gulo, p. 579 



MM. Form slender and graceful with 

 long tail and slender legs. 

 N. Size large; length 20 inches or 

 more. (Mink.) 



Genus Lutreola, p. 581 

 NN. Size smaller; not over 18 

 inches. (Weasels). 



Genus Putorius, p. 584 

 II. Hind feet with only four toes; head somewhat 

 pointed. (Wolves, foxes, etc.). 



Family Canidae, p. 547 

 J. Size large; length not less than 45 inches; 

 upper incisors divided into lobes. (Wolves 

 and coyotes.) Genus Cams, p. 557 



J J. Size smaller, less than 45 inches; upper in- 

 cisors not lobed. (Foxes.) 

 K. Hairs of tail soft like those of body; sides 

 rusty red; skull rounded on top. 



Genus Vulpes, p. 551 

 KK. Tail with a mane of stiff hairs on back; 

 back and sides grayish; skull flat on 

 top. Genus Urocyon, p. 547 



Order MARSUPIALIA. 



MARSUPIALS. 



Mammals in which the young are born before development has 

 progressed far. Young placed in a pouch on the abdomen of the 

 mother where they are nourished by milk which she forces out of 

 her teats into their attached mouths by muscular contraction. 

 Brain small and rudimentary. Pelvis with two small separate 

 (marsupial) bones projecting forward from the pubes. 



The Marsupials are mammals which, in the process of evolu- 

 tion, stopped before they had reached the complex condition now 

 attained by their relatives. The principal difference is found in 

 the reproductive organs. The organs of the female are all dupli- 

 cated, almost to the e;cternal opening, inst(iad of joining in a com- 

 mon uterus as in other mammals. The fertilized ova develop with- 

 out the formation of any special structure (placenta) for the at- 



