Contents 



Page 



Abstract 1 



Introduction 2 



Systematics and Taxonomy 4 



Distribution and Migrations 7 



Monthly Records 8 



January 8 



February 9 



March 10 



April 11 



May 12 



June 14 



July 15 



August 16 



September 17 



October 18 



November 19 



December 21 



Environmental Factors 21 



Concentrations and Migrations 26 



General Morphology and Growth 29 



Age Determination 29 



Body Size and Weight 30 



Length of Body 30 



Weight of Body 33 



Growth of Reproductive Organs 35 



Baculum 35 



Testes 36 



Os clitoridis 39 



Uterus 40 



Relation of Physical to Reproductive Development 41 



Skin and Hair 43 



General Appearance and Thickness of Skin 44 



Functional Aspects of Skin 47 



Blubber 49 



Epidermal Structure and Topographic Variation 49 



Pilosebaceous Units 53 



Pelages and Molts 54 



Prenatal Pelage and Molt 54 



Postnatal Molt of Calves 58 



Pelage and Annual Molt of Adults 60 



Molt Process 62 



Facial Vibrissae 64 



Vibrissal Function 69 



Dentition 71 



Definitions 72 



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