xx LIST OF ILLUSTRATIONS 



1214. Development of Graafian follicle ....... 586 



1215. Segmentation of Mammalian oosperm ...... 588 



1216. Lepus cuniculus, embryonic area ....... 589 



1217. ,, ,, embryos ......... 590 



1218. Formation of foetal membranes of Mammal ..... 591 



1219. Lepus cuniculus, embryo with membranes ..... 592 



1220. Erinaceus, formation of amnion and trophoblast .... 593 



1221. Formation of amnion in Mammalia ....... 594 



1222. Macropus, mammary foetus ......... 596 



1223. Hypsiprymnus rufescens, embryo and foetal membrane . . 596 



1224. Phascolarctos cinereus ,, ,, ,, ,, . . 596 



1225. Perameles obesula , , , , placenta .... 597 



1226. Theria and Monotremata, blastula ....... 597 



1227. Phascolotherium bucklandi, mandible ...... 601 



1228. Plagiaulax becklesi, mandible ....... .601 



1229. Diprotodon australis, skeleton ........ 602 



1230. Nototherium mitchelli, skull ........ 603 



1231. Thylcoles carnifex ... ........ 604 



1232. Glyptodon clavipes, skeleton ...... . 604 



1233. Mylodon robustus . .......... 605 



1234. Squalodon, teeth . . . ........ 605 



1235. Dinotherium giganteuin, skull ........ 607 



1236. Tillotherium fodiens, skull ......... 609 



1237. Diagram illustrating the mutual relationship of the Chordata . 616 



1238. Phyla of 



animals . 618 



1239. Map showing depths of sea between the British Isles and the 



Continent .......... 623 



1240. Map showing depths of sea between New Zealand and Australia . 624 



1241. Diagram illustrating the relations of the Zoo-geographical Regions 634 



