class="tdr">217

70. Cirolana borealis. About Twice Natural Size 219 71. A, Front Part of Body of a Prawn (Spirontocaris polaris), from Above, showing on the Right Side a Swelling of the Carapace caused by the Presence of the Parasite Bopyroides hippolytes in the Gill Chamber; B, the Female Parasite extracted and further enlarged; C, the Male Parasite on Same Scale as the Female 222 72. A Fish-louse (Caligus rapax), Female. × 5 225 73. Stages of Development of Lernæa branchialis. F is Slightly, the Other Figures greatly, enlarged 226 74. Stages of the Life-history of Hæmocera danæ, One of the Monstrillidæ 229 75. Free-swimming Stages of Sacculina carcini. Much enlarged 232 76. Early Stage of Sacculina within the Body of a Crab 234 77. Rostrum and Fore Part of Carapace, seen from Above, of (A) Red-clawed Crayfish (Astacus fluviatilis) and (B) White-clawed or English Crayfish (Astacus pallipes) 242 78. The Common Shrimp (Crangon vulgaris). Natural Size 244 79. The Norwegian Deep-water Prawn (Pandalus borealis), Female 246 80. The Gribble (Limnoria lignorum). Much enlarged 254 81. Restoration of a Trilobite (Triarthrus becki), showing the Appendages. Upper Side on Right, Under Side on Left. Slightly enlarged 258 82. Ceratiocaris papilio, One of the Fossil Phyllocarida 262 83. Pygocephalus cooperi, from the Coal-measures: Under Side of a Female Specimen, showing the Overlapping Plates of the Brood-pouch 263 84. The Tasmanian "Mountain Shrimp" (Anaspides tasmaniæ), a Living Representative of the Syncarida. Slightly enlarged 264 85. Præanaspides præcursor, One of the Fossil Syncarida, from the Coal-measures of Derbyshire. Slightly enlarged 265

 

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