xiv ILLUSTRATIONS 



TEXT FIGURES 



PAGE 



Newly-born Kangaroo ...... 8 



Ring-tailed Lemur and Young . . . . .18 



Horns of Fossil Deer ....... 50 



Wing of Hoatzin and Young Game-bird {Gallus) . 120 

 Skeleton of Wings of Embryo and Newly-hatched 



Bird, and of Leg of a Young Bird . . .132 

 Skeleton of Wing of a Young Rhea . . , -IBS 

 Beaks of Nestling Birds compared with those of the 



Adults ......... 143 



Beak of an Adult and Nestling Cormorant, showing 



the Closure of the Nostrils .... 147 



Stages in the Development of a Newt . . 186, 187 

 The Funnel-mouthed Tadpole (Megalophrys Montana) 189 

 Nest of Phyllomedusa savvag/i ..... 194 



Midwife Toad ........ 195 



GoELDi's Frog ........ 195 



Pouched Frog ........ 196 



Surinam Toad ........ 198 



Darwin's Frog ........ 199 



Ichthyophis, the Snake-like Amphibian . . . 203 

 LarVjE of Ichthyophis ....... 205 



Young Mollusca ........ 260 



Young Spider spinning Gossamer .... 262 



A Lesson in Degeneration 266 



