LIST OF ILLUSTEATIOXS. XV 



PAGE 



S5. The Branchial Lungs of AmpuUaria 191 



66. Gecaroimts iiosticola, a Land Crab . . . . .192 



57. a, I/iipea ; i, Ocypoda 196 



68. Ifnivalves that cling to Kocks by means of the Foot , . 203 



59. Various Animals that swim by means of Fins . . . 206 



60. Creeping MoUusca 208 



61. Diagram of Section through Neritina and Navicella, showing 



the position of the Operculum 211 



62. Section of the Shell of Unio (a Fresh-water Mussel) . 213 



63. Shells with living Animals, but injured by Ei;osion . . 214 

 %i. The Inhabitants of Coral Galls 217 



65. Seriatopora hyatnx, with Galls inhabited by liapahca/rciims 



maj'supialis ......... 218 



66. A Gall on Senatopora hystrix, opened 219 



67. Sideropora palmata, with a Gall or Cyst .... 220 



68. Oonia&trcea Bournoni, M. Edw., with a Funnel in which lives 



a Oi-yptocMrm coralliodytes, Hiller 222 



69. Diagram of the Growth of a Colony of Porites . . . 225 



70. a, Section through Kriangle ; J, through Babelthuap at 



AibuHt ; c, through PclcUw 258 



71. Pyrosoma gigaa ......... 279 



72. Oiiehidium toiiganum, nat. size 281 



73. The Shells of Philippine Snails 284 



74. Ampliicl/roimis macuUferus, Sow. 285 



75. Trocomorplw, sp 288 



76. TemnocepJiala eAiknsis, Blanchard 293 



77. Two operculated Fresh-water Snails . . . . ' . 299 



78. Various Fresh-water Univalves 300 



79. a, an Amoeba in a Locomotive State ; b, the same, encysted . 302 



80. Cypi-is ap. from the Philippines 304 



81. Trocliospluera cEgKotorialis, from the Philippines . . . 306 



82. Coregomis MemalU 321 



83. A piece of Wood bored by Limnoria terelrans, from Heligo- 



land 326 



84. A piece of solid Limestone, similarly bored, from Ireland . 326 



85. Part of a Stock of Campanularla, a Hydroid Polyp, with 



closed pear-shaped Galls, containing a Sea-Spider, Pyc- 



iiogonida ......... 3.S2 



86. Beteropsammiia Michcliiii . , 335 



87. Hi^eroeyathua pMUppensis 336 



88. Rhizoohihis antipatlium, Steenstrup 337 



89. A Specimen of Ca/rcinus mcenas, from Heligoland, with three 



Individuals of the Parasitic' Sacculina carcini . . 340 



90. Antipatliex filix, PourtaUs 341 



