LTST OF ILLUSTRATIO>'S. XV 



TAGE 



55. The Branchial Lungs Qf Ampullavia 191 



66. Gecaroiims rusticola, a Land Crab 192 



57. a, Liipca ; i, Ocypoda 196 



58. Univalves that cling to Rocks 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 Erosion . . 214 



64. The Inhabitants of Coral Galls 217 



65. ScnatojJora hystrix, with Galls inhabited by Hapalocarciiius 



marsupialis . . . . . . . .218 



66. A Gall on Senatopora hysirir, opened . .... 219 



67. Sideropm-a palmata, with a Gall or Cyst .... 220 



68. Goniastrcea Smirnoni, M. Edw., with a Funnel in which lives 



a CryptooMrus coralliodytes, Hiller . .... 222 



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



70. a, Section through Kriangk ; >, through Bahelthuaj) at 



Aibukit ; c, through PeJcUw 258 



71. Pyrosoma gigas 279 



72. Onclddium toiigannin, nat. size . ..... 281 



73. The Shells of Philippine Snails 284 



74. AmpJudronms macuUfe7-us, Sow. . . ... 285 



75. Ti-oooiTwrpTia sp. ..... . . 288 



76. Temnooepluila cldhiisis, Blanchard ...... 293 



77. Two operoulated Fresh-water Snails 299 



78. Various Fresh-water Univalves . . . . . . 300 



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



80. Cypns sp. from the Philippines 304 



81. Trocliospliara ceqiiatorialis, from the Philippines . . . 306 



82. Coregonus Idemalis . .... . 321 



83. A piece of Wood bored by Zimnoria terelrann, from Heligo- 



land 326 



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



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



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



nogonida . 332 



86. Heterojjsammia Michelini .... . . 335 



87. Heterocyathus pldlippensis . ..... 336 



88. Rhizoehilus antipathmn, Steenstrup 337 



89. A Specimen of Carcinus manas, from Heligoland, with three 



Individuals of the Parasitic (SiJccwZiwararriwi . . 340 



90. Antipathes filix, Pourtal^s 341 



