XVI ILLUSTRATIONS. 



Page. 



Fio. 44. Genus Antropora Norman, 1903 176 



45. Genus Megapora Hincks, 1877 177 



46. Genus Foveolaria Busk, 1884 178 



47 . Family Aeteidae Smitt, 1867 179 



48. Family Scrupocellariidae Levinsen, 1909 



49. Genus Scrupocellaria Van Beneden, 1844.. 184 



50. Genus Caberea Lamouroux, 1816 



51. Genus Nellia Busk, 1852 195 



52. Family Eucratiidae Hincks, 1880 199 



53. Genus Gemellaria Savigny, 1811 200 



54. Structure of the Goilostega . 201 



55. Subfamily Onychocellidae Jullien, 1881 202 



56. Genera of the Onychocellidae 204 



57. Genus Rectonychocella Canu and Bassler, 1917 209 



58. Genus Velumella Canu and Bassler, 1917 213 



59. Genus Smittipora Jullien, 1881 225 



60. Anatomy of the subfamily Microporidae - . 226 



61. Genera of subfamilies Microporidae and Lunulaviidae 227 



i'i'1 Genus Gargantu t .Tullien, 1888 230 



63. Genus Micropora Gray, 1848 235 



64. Subfamily LuuuUriidae Levinsen, 1909 239 



65. Family Aspidostomidae Canu, 1908 253 



60. Genus Rhagasostoma Koschinsky, 1885 254 



67. Genus Odontionella Canu and Bassler, 1917 256 



68. Genus Euritina ( 'anu, 1900 257 



69. Genus Labiopora Levinsen , 1909 ?58 



70. Genus Crateropora Levinsen, 1909 259 



71. Family Steganop irellidae Levinsen, 1909 260 



72. Genus Siphonoparella Hincks, 1880 265 



73. Family Thalamoporellidae Levinsen, 1909 266 



74 . Genus Thalamoporella Hincks, 1-887 268 



75. Family Cellariidae Hincks, 1880 270 



76. Genus Cellaria Lamouroux, 1812 272 



77. Genus Cianotremella Canu, 1911 275 



78. Genus Macropora MacGillivray, 1895 277 



79. Structure of the Ascophora Levinsen, 1909 280 



80. Sketch showing structure of a costule 281 



81 . Genera of the Costulae 282 



82. Genus Membraniporella Smitt, 1873 284 



83. Genus Cribriliua Gray, 1848 291 



84. Genus Puellina Jullien, 1886 294 



85. Genus Gephyrotes Norman, 1903 300 



86. Genus A rachnopusia Jullien, 1886 312 



87. Genus Figularia Jullien, 1886 314 



88. Genus Aspidelectra Levinsen, 1909 317 



89. Genera of Acroporidae Canu, 1913 318 



90. Genus Acropora Reuss, 1869 319 



91. Genus Pachytheca Canu, 1913 323 



92. Genus Beisselina Canu, 1913 323 



93. Genus Hippothoa Lamouroux, 1821 (Hincks, 1880) 326 



94. Genus Trypostega Levinsen, 1909 



95. Genus Haplopoma Levinsen, 1909 332 



