LIST OF ILLUSTEATIONS. 



Leaf Butterfly in flight and repose (from Mr. A. Wallaces " Malay's Archi- 

 pelago") 43 



Walking-Leaf Insect 47 



Pleuronectidae, with the peculiarly placed eye in different positions (from Dr. 



Traquair's paper in Lirm. Soc. Trans., 1865) . . . .49,180 



Mouth of Whale (from Prof. Owen's " Odontography") ... 53 



Four plates of Baleen seen obliquely from within (from Prof. Owen's " Odon- 



tography") ......... 54 



Dugong 54, 189 



Echinus Or Sea Urchin . . . . . . . 56, 181 



Pedicellariae of Echinus vary much enlarged ..... 59 



Rattlesnake 62 



Cobra (from Sir Andrew Smith's " Soutliern Africa'"') ... 63 



Wingbones of Pterodactyl, Bat, and Bird (from Mr. Andrew Murray's 



" Geographical Distribution of Mammate") . . . .77,144,111 



Skeleton of Flying-Dragon .78,172 



Centipede (from a specimen in the Museum of the Royal College of Sur- 

 geons) . . . 79, 173 



Teeth of Urotrichus and Perameles ...... 82 



The Archeopteryx (from Prof. Owen's " Anatomy of Vertebrata "") . . 86, 146 



Cuttle-Fish 5 88, 155 



Skeleton of Ichthyosaurus 92,121,146,191 



Cytheridea Torosa (from Messrs. Brady and Robertson's paper in Ann. and 



Mag. of Nat. Hist., 1870) 93 



A Polyzoon, with BirdVhead processes ...... 94 



Bird's-head processes greatly enlarged ...... 95 



Antechinus Minutissimus and Mus Delicatulus (from Mr. Andrew Murray*.* 



" Geographical Distribution of Mammals") .... 96 



