[...]... of the ovum of an echinoderm 10 0 10 7 11 1 11 3 12 1 12 2 12 3 12 5 12 6 Fertilization of the ovum of a starfish Karyokinesis of a typical tissue-cell (epithelium of Salamander) Study of successive changes taking place in the nucleus of an epithelium-cell, preparatory to division of the cell Formation and conjugation of the pronuclei in Ascaris megalocephala Segmentation of ovum The contents of an ovum... to 18 90 The lectures for 18 88 were devoted to the history of biology from the earliest recorded times till the publication of the “Origin of Species” in 18 59; the lectures for 18 89 dealt with the theory of organic evolution up to the date of Mr Darwin s death, in 18 82; while those of the third year discussed the further developments of this theory from that date till the close of the course in 18 90... animals below the Mammalia Another series of embryos, also at three comparable and progressive stages of development, representing four different divisions of the class Mammalia Diagram of geological succession of the classes of the Animal Kingdom 15 0 15 1 15 1 15 1 15 2 15 3 16 5 Skull of Oreodon Culbertsoni ,62 Horns of Cervus dicrocerus Horns of C matheronis Horns of C pardinensis Horns of C issiodorensis... issiodorensis Horns of C Sedgwickii Successive stages in the development of an existing Deer’s Antlers Homocercal tail Heterocercal tail Vertebrated but symmetrical fin (diphycercal) Tail of Archæopteryx Tail of modern Bird Archæopteryx macura, restored Skeleton of Polar Bear 16 7 16 8 16 8 16 8 16 8 16 8 16 9 16 9 17 0 17 0 17 1 17 1 17 2 17 4 Skeleton limb of Man, Dog, Hog, Anterior of Lion Sheep, and Horse ... limb of Man, Monkey, Dog, Sheep, and Horse Posterior limb of Baptanodon discus, and anterior limb of Chelydra serpentina Paddle of a Whale Fossil skeleton of Phenacodus primævus Bones of the foot of four different forms of the perissodactyl type Bones of the foot of four different forms of the artiodactyl type Feet and teeth In fossil pedigree of the Horse Palæotherium (Lower Tertiary of 17 5 17 6... Diagram of heart and gill-arches of a fish One gill-arch, with branchial fringe attached Diagram of heart and gill-arches in 14 0 14 3 14 4 14 5 14 8 14 8 14 9 15 0 15 0 a lizard Ideal diagram of primitive gill-or aortic-arches The same, modified for a bird The same, modified for a mammal A series of embryos at three comparable and progressive stages of development, representing each of the classes of vertebrated... VI 1 23 50 98 15 6 Geographical Distribution CHAPTER VII The Theory of Natural Selection CHAPTER VIII Evidences of the Theory of Natural Selection CHAPTER IX Criticisms of the Theory of Natural Selection CHAPTER X The Theory of Sexual Selection, and Concluding Remarks 204 Appendix to Chapter V Note A to Page 257 Note B to Page 295 4 21 443 445 2 51 285 333 379 Note C to Page 394 Index 448 4 51 LIST OF. .. in the University of Edinburgh, a lectureship on The Philosophy of Natural History,” and I was invited by the Senatus to deliver the lectures This invitation I accepted, and subsequently constituted the material of my lectures the foundation of another course, which was given in the Royal Institution, under the title “Before and after Darwin. ” Here the course extended over three years—namely from 18 88... of colour in Ptarmigan (Lagopus mutus) 9.Œdicneus crepitans, showing the instinctive attitude of concealment 304 304 305 306 307 307 308 309 310 311 312 317 320 0 Imitative forms and colours in insects 1 The larva of Puss Moth (Cerura vinula) 2 The larva of Puss Moth in disturbed attitude 3 Three cases of mimicry 4 Two further cases of mimicry; flies resembling a wasp in the one and a bee in the other... ovum The contents of an ovum in an advanced stage of segmentation, drawn in perspective Formation of the gastrula of Amphioxus Gastrulation Gastrula of a Chalk Sponge 12 7 12 9 13 1 13 2, 13 3 13 5 13 5 13 7 13 8 13 9 Prophysema primordiale, an extant gastræa-form Ideal primitive vertebrate, seen from the left side The same in transverse section through the ovaries Amphioxus lanceolatus Balanoglossus . y0 w0 h0" alt="" The Project Gutenberg EBook of Darwin, and After Darwin (Vol. 1 and 3, of 3), by George John Romanes This eBook is for the use of anyone anywhere at no cost and with almost no. the terms of the Project Gutenberg License included with this eBook or online at www .gutenberg. org Title: Darwin, and After Darwin (Vol. 1 and 3, of 3) An Exposition of the Darwinian Theory and a. LN Yaddanapudi and the Online Distributed Proofreading Team at http://www.pgdp.net