XXIV 



ILLUSTRATIONS 



FIG. 



30. Nervous System of the Cockchafer, from Straus-Durck- 



heim's Monograph (1828), 



31. Ehrenberg, i 795-1876, 



32. Gesner, 1516-1565, 

 ^. John Ray, 1628-1705, 



34. Linnaeus (1707-17 78) at Sixty, 



35. Karl Th. von Siebold, 



36. Rudolph Leuckart, . 



37. Severinus, 1580-1656, 



38. Camper, 177 2-1 789, 



39. John Hunter, 17 28-1 793, . 



40. Vicq d'Azyr, i 748-1 794, 



41. Cuvier (1 769-1829) as a Young Man, 



42. Cuvier at the Zenith of His Power, 



43. H. Milne-Edwards, 1800-1885, 



44. Lacaze-Duthiers, 1821-1901, 



45. Lorenzo Oken, 1 779-1851, 



46. Richard Owen, 1804-189 2, 



47. J. Fr. Meckel, 1 781-1833, 



48. Karl Gegenbaur, 1826-1903, 



49. Bichat, 1771-1801, 



50. Von Koelliker, 181 7-1905, 



51. Rudolph Virchow, 1821-1903, 



52. Franz Leydig, 1821-1908 . 



53. S. Ramon y Cajal, 



54. Albrecht Haller, 1 708-1 777, 



55. Charles Bell, 1 774-1842, 



56. Johannes Muller, 1801-1858, 



57. Ludwig, 1816-1895, 



58. Du Bois-Reymond, 1818-1896, 



59. Claude Bernard, 1813-1878, 



60. Frontispiece of Harvey's Generatione Animalium (165 1) 



61. Selected Sketches from Malpighi's Works, 



62. Marcello Malpighi, 1628-1694, 



63. Plat»e from Wolff's Theoria Generationis (1759), 



64. Charles Bonnet, 1 720-1793, .... 



65. Karl Ernst von Baer, 1 792-1876, . 



66. Von Baer at about Seventy Years of Age, . 



67. Sketches from Von Baer's Embryological Treatise (1828) 



68. A. Kowalevsky, 1840-190 1, 



69. Francis M. Balfour, 1851-1882, 



70. OSKAR HERTWIG IN 1890, . 



71. Wilhelm His, 1831-1904, . 



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