LIST OF ILLUSTRATIONS 



Fig. pagf, 



175. Pliotographs to one scale of the South American 



Cariama and the sknll of the gigantic extinct 

 Phororachus ....... 240 



176. Photographs to one scale of the Apteryx, the Ostrich 



and the giant Moa of New Zealand, each with its 



egg 242 



177. The hard bony scales of a Ganoid Fish . . 247 



178. Photograph of a dried skin of the Polypterus of 



the Nile ' . .249 



179. A fossil Ganoid Fish, as discovered embedded in rock 250 



180. Outline drawing of the extinct Ganoid FishOsteo- 



leps 251 



181. The Australian Lung-fish Ceratodus . . . 252 



182. The extinct Devonian Fish Dipterus . . . 253 



183. Outline drawings of the extinct fish Ptericlithys 254 



184. Photograph of a cardboard model of Pterichthys 255 



185. The upper figure is a restored outline of the curious 



Devonian fish Coccosteus .... 257 



186. Photograph from the original specimen of Cephalas- 



pis lyeli, preserved in the Natural History 

 Museum ....... 258 



187. Drawings of the head-shield of the fossil fish 



Pteraspis ....... 259 



188. Photograph (of the natiiral size) of a specimen 



showing parts of the upper and lower head-shields 

 of Pteraspis crouchii, with ten rows of lozenge- 

 shaped scales attached . . . . .260 



189. Photographs of models of the Devonian Fish 



Drepanaspis, in the Natural History Museum 261 



190. Outline drawing of the Silurian fish Birkenia 262 



xxi 



