XX 



LIST OF ILLUSTRATIONS 



Fin. 



1214. 



121."). 

 121(>. 

 1217. 

 1218. 

 1219. 

 1220. 

 1221. 

 1222. 

 1223. 

 1224. 

 1225. 

 122fi. 

 1227. 

 1228. 

 1229. 

 1230. 

 1231. 

 1232. 

 1233. 

 1234. 

 1235. 

 1236. 

 1237. 

 1238. 



Developnient of Graafian follicle 

 Segmentation of Maniiiialian oosperm 

 Le])us cuniculus, embryonic area 



,, em1)ryos 



Formation of fcetal membi'anes of Mauniial 

 Lepiis cuniculus, embryo with memljranes 

 Erinaceus, formation of anniion and tr(ipho1)last 

 Formation of amnion in Mammalia 



Macropus, mammary fietus 



Ilypsiprymnus rufescens, em>)ryo and ftutal membrane 



Phascolarctos cinereus ,, ,, ,, ,, 



Perameles obesula ,, ,, placenta 



Theria and Monotremata, blastula 



Phascolotherium bucklandi, mandible 



Plagiaulax becklesi, mandible 



Diprotodon australis, skeleton 



Nototherium mitchelli, skull 



Thylcoles carnifex . 



Glyptodon clavipes, skeleton 



Mylodon robustus . 



Scjualodon, teeth 



Dinotherium giganteum, skull 



Tillotherium fodiens, skull . 



Diagram illustrating the mutual r 



elationship of the Chordata 



,, ,, ,, Phyla of 

 animals 



PAOE 



586 

 588 

 589 

 590 

 591 

 592 

 593 

 594 

 596 

 596 

 596 

 597 

 597 

 601 

 601 

 602 

 603 

 604 

 604 

 605 

 605 

 607 

 609 

 616 



618 



