1CHAPTER III MAN’S COUSINS THE APES
7CHAPTER IX LOVE-MAKING AMONG FISHES
2CHAPTER IV AT DAGGERS DRAWN
8CHAPTER X SOME OF THE “LOWER ORDERS”
3CHAPTER V THE LION AND HIS KIN
9CHAPTER XI BEETLES THAT “BLUFF”
4CHAPTER VI COURTSHIP AMONG BIRDS
10CHAPTER XII SCORPIONS, SPIDERS AND CRABS
5CHAPTER VII THE SEXUAL SELECTION THEORY AS APPLIED TO BIRDS
11CHAPTER XIII SOME STRANGE MARRIAGE-CUSTOMS: AND VIRGIN BIRTHS