46. THE CHOLERA SPIRILLUM, OR COMMA-BACILLUS OF KOCH 241 47. A YOUNG SPIDER 288 48. VIEW OF THE LOWER SURFACE OF THE HEAD AND BODY OF A LARGE BURMESE SPIDER 290 49. SECTION THROUGH THE BODY OF A SPIDER TO SHOW THE SPINNING ORGANS 291 50. ONE OF THE TWO MIDDLE SPINNERETS OF THE COMMON GARDEN SPIDER (_EPEIRA DIADEMA_) 292 51. THE COMMON GARDEN SPIDER, CORRECTLY CALLED THE WHITE-CROSS SPIDER (_EPEIRA DIADEMA_) 293 52. ON THE RIGHT TWO JUMPING BEANS: ON THE LEFT THE CATERPILLAR REMOVED FROM THE JUMPING BEAN 299 53. THE CATERPILLAR OF THE MOTH (_CARPOCAPSA SALTITANS_) REMOVED FROM THE JUMPING BEAN 300 54. THE MOTH (_CARPOCAPSA SALTITANS_) 301 55. EARLY WINGED FEMALE HOP-LOUSE 316 56. MALE HOP-LOUSE 317 57. ORDINARY WINGLESS FEMALE HOP-LOUSE 318 58. FOUNDRESS OR STOCK-MOTHER OF THE HOP-LOUSE 323 59. SIDE VIEW OF WINGED VIVIPAROUS FEMALE OF THE HOP-LOUSE 323 60. AN ANT “MILKING” A “PLANT-LOUSE” OR “GREEN-FLY” FOR HONEY-DEW 324 61. SINGLE EGG-TUBE OR OVARIAN TUBE OF AN INSECT 329 62. THE DEATH-WATCH BEETLE (_XESTOBIUM TESSELLATUM_) 350 63. THE SILVER-FISH INSECT (_LEPISMA SACCHARINA_) 353 64. THE BOOK-LOUSE, OR _ATROPOS DIVINATORIA_ 354 65. THE HUMAN SKULL FROM THE CHAPELLE-AUX-SAINTS 370 66. AN UNPOLISHED BUT BEAUTIFULLY CHIPPED FLINT KNIFE OF THE NEOLITHIC AGE 374 67. A POLISHED FLINT AXE-HEAD OF THE NEOLITHIC AGE 375 68. HARPOONS OF THE PALÆOLITHIC PERIOD 379 69. A PIECE OF MAMMOTH IVORY CARVED WITH SPIRALS AND SCROLLS 380 70. CARVING ON AN ANTLER OF A GROUP OF THREE RED DEER AND FOUR FISHES 381 71. PAINTING OF A BISON 382 72. BACK AND FRONT VIEW OF A FLINT IMPLEMENT OF THE MOUSTIER TYPE 384 73. FLINT PICK FROM THE LOWER PLEISTOCENE OF THE THAMES VALLEY 387 74. A ROUGH TYPE OF FLINT IMPLEMENT FROM THE LOWER PLEISTOCENE OF THE SOMME VALLEY 388 75. A PROFILE AND A FRONT VIEW OF THE SKULL AND LOWER JAW OF A MAN OF THE CROMAGNARD RACE OR REINDEER MEN 389 76. THREE VIEWS OF THE SKULL-TOP FROM NEAR DUSSELDORF ON THE RHINE, KNOWN AS THE NEANDERTHAL SKULL 392