VI 
CONTENTS 
PAGE 
XXIV.— GNUS AND DUIKERS.. . 299 
XXV.— PESTS : JIGGERS, TICKS, AND MOSQUITOES. 307 
XXVI.— FLIES AND SLEEPING SICKNESS .. 31S 
XXVII.— TERMITES (WHITE ANTS). 3^7 
XXVIII.— BEAKS. 337 
XXIX.— CRESTS. 354 
XXX.— TAILS. 367 
XXXI.— IVORY. 387 
XXXII.— HIPPOPOTAMUS. 405 
