CONTENTS 



Introduction pcge 95 



Material 95 



Sex ratio 96 



External characters 97 



Body proportions 97 



Colour 108 



Body surface, Palate and Tongue . 120 



Teeth 120 



Spermaceti 122 



Food 122 



Blubber 123 



Parasites 126 



External 126 



Internal 128 



Reproduction 128 



The male : 



External genitalia 128 



Testis 128 



The sexual cycle 129 



The female : 



External genitalia 132 



Ovaries 132 



Uterus 132 



Mammary glands 134 



Gestation and breeding season 134 



Sexual cycle 138 



Growth and age 144 



Migration 154 



Whaling and the Sperm whale 160 



Summary 161 



References 164 



Appendix. Measurements 165 



Plates II I-XI foUomug page 168 



