Produced by Sue Asscher <asschers@bigpond.com> THE EVOLUTION OF MAN A POPULAR SCIENTIFIC STUDY BY ERNST HAECKEL VOLUME 2. HUMAN STEM-HISTORY, OR PHYLOGENY. TRANSLATED FROM THE FIFTH (ENLARGED) EDITION BY JOSEPH MCCABE. [ISSUED FOR THE RATIONALIST PRESS ASSOCIATION, LIMITED.] WATTS & CO., 17, JOHNSON'S COURT, FLEET STREET, LONDON, E.C. 1911. CONTENTS OF VOLUME 2. LIST OF ILLUSTRATIONS. INDEX. CHAPTER 2.16. STRUCTURE OF THE LANCELET AND THE SEA-SQUIRT. CHAPTER 2.17. EMBRYOLOGY OF THE LANCELET AND THE SEA-SQUIRT. CHAPTER 2.18. DURATION OF THE HISTORY OF OUR STEM. CHAPTER 2.19. OUR PROTIST ANCESTORS. CHAPTER 2.20. OUR WORM-LIKE ANCESTORS. CHAPTER 2.21. OUR FISH-LIKE ANCESTORS. CHAPTER 2.22. OUR FIVE-TOED ANCESTORS. CHAPTER 2.23. OUR APE ANCESTORS. CHAPTER 2.24. EVOLUTION OF THE NERVOUS SYSTEM. CHAPTER 2.25. EVOLUTION OF THE SENSE-ORGANS. CHAPTER 2.26. EVOLUTION OF THE ORGANS OF MOVEMENT. CHAPTER 2.27. EVOLUTION OF THE ALIMENTARY SYSTEM. CHAPTER 2.28. EVOLUTION OF THE VASCULAR SYSTEM. CHAPTER 2.29. EVOLUTION OF THE SEXUAL ORGANS. CHAPTER 2.30. RESULTS OF ANTHROPOGENY. LIST OF ILLUSTRATIONS. FIGURE 2.210. THE LANCELET. FIGURE 2.211. SECTION OF THE HEAD OF THE LANCELET. FIGURE 2.212. SECTION OF AN AMPHIOXUS-LARVA. FIGURE 2.213. DIAGRAM OF PRECEDING. FIGURE 2.214. SECTION OF A YOUNG AMPHIOXUS. FIGURE 2.215. DIAGRAM OF A YOUNG AMPHIOXUS. FIGURE 2.216. TRANSVERSE SECTION OF LANCELET. FIGURE 2.217. SECTION THROUGH THE MIDDLE OF THE LANCELET. FIGURE 2.218. SECTION OF A PRIMITIVE-FISH EMBRYO. FIGURE 2.219. SECTION OF THE HEAD OF THE LANCELET. FIGURES 2.220 AND 2.221. ORGANISATION OF AN ASCIDIA. FIGURES 2.222 TO 2.224. SECTIONS OF YOUNG AMPHIOXUS-LARVAE. FIGURE 2.225. AN APPENDICARIA. FIGURE 2.226. Chroococcus minor. FIGURE 2.227. Aphanocapsa primordialis. FIGURE 2.228. PROTAMOEBA. FIGURE 2.229. ORIGINAL OVUM-CLEAVAGE. FIGURE 2.230. MORULA. FIGURES 2.231 AND 2.232. Magosphaera planula. FIGURE 2.233. MODERN GASTRAEADS. FIGURES 2.234 AND 2.235. Prophysema primordiale. FIGURES 2.236 AND 2.237. Ascula of Gastrophysema. FIGURE 2.238. Olynthus. FIGURE 2.239. Aphanostomum Langii. FIGURES 2.240 AND 2.241. A TURBELLARIAN. FIGURES 2.242 AND 2.243. Chaetonotus. FIGURE 2.244. A NEMERTINE WORM. FIGURE 2.245. AN ENTEROPNEUST. FIGURE 2.246. SECTION OF THE BRANCHIAL GUT. FIGURE 2.247. THE MARINE LAMPREY. FIGURE 2.248. FOSSIL PRIMITIVE FISH. FIGURE 2.249. EMBRYO OF A SHARK. FIGURE 2.250. MAN-EATING SHARK. FIGURE 2.251. FOSSIL ANGEL-SHARK. FIGURE 2.252. TOOTH OF A GIGANTIC SHARK. FIGURES 2.253 TO 2.255. CROSSOPTERYGII. FIGURE 2.256. FOSSIL DIPNEUST. FIGURE 2.257. THE AUSTRALIAN DIPNEUST. FIGURES 2.258 AND 2.259. YOUNG CERATODUS. FIGURE 2.260. FOSSIL AMPHIBIAN. FIGURE 2.261. LARVA OF THE SPOTTED SALAMANDER. FIGURE 2.262. LARVA OF COMMON FROG. FIGURE 2.263. FOSSIL MAILED AMPHIBIAN. FIGURE 2.264. THE NEW ZEALAND LIZARD. FIGURE 2.265. Homoeosaurus pulchellus.