53. Spinnerets of Garden Spider 104 54. Jumping Spider 106 55. Falces of Male Jumping Spider 106 56. Foot of Jumping Spider. Scopula much enlarged 108 57. Diving Spiders 109 58. Cell of Diving Spider 112 59. Red Water Mite 114 60. Larva of Water Mite 117 61. Nymph of Water Mite 117 62. Beetle Mite 119 63. _Lithobius forficatus._ Mouth parts seen from below. (After Graber) 124 64. The Common Millepede 126 65. Segments of Millepede (magnified) 127 66. Prawn 132 67. First walking leg of Shrimp (enlarged) 134 68. Mysis, or the Opossum Shrimp 135 69. Maxillipedes and Maxilla of Shore Crab. (After Savigny) 138 70. Stomach of Crab laid open 139 71. Gammarus. (After Sars) 142 72. Maxillipedes of _Gammarus marinus_ (magnified) 146 73. Nest-building Amphipod (from life) 148 74. Water Woodlouse 153 75. Mouth-lock. (After Burgess) 161 76. Dytiscus Larvae 162 77. Pupa of Dytiscus 164 78. Larva of _Limnobia replicata_ 167 79. Forked spine of Limnobia (enlarged) 168 80. Pupa case of Limnobia 169 81. Fore wing of Bee, showing marginal fold (×7) 170 82. Larva of _Paraponyx stratiotata_ (enlarged) 173 83. Diagram of segment of Paraponyx, showing arrangement of tracheal gills 175 84. Gill of Paraponyx larva. (After De Geer) 176 85. Larva of Sialis (enlarged) 179 86. Diagram of Sialis larva, showing arrangement of gills 181 87. Pupa of Sialis 181 88. Larvae of _Ptychoptera paludosa_ (from life) 184 89. Ptychoptera Larva (enlarged). Tail. (After Lyonnet) 186 90. Pupa of Ptychoptera. (After Lyonnet) 187 THROUGH A POCKET LENS CHAPTER I