58. SECTION OF THE SHELL OF A COMPOUND FORAMINIFER 107 59. SECTION OF A NUMMULITE SHELL 108 60. _Globigerina bulloides_, AS SEEN WHEN ALIVE, MAGNIFIED 108 61. SECTION OF A PIECE OF NUMMULITIC LIMESTONE 109 62. A GROUP OF RADIOLARIAN SHELLS, MAGNIFIED 111 63. THREE INFUSORIANS, MAGNIFIED 113 64. A PHOSPHORESCENT MARINE INFUSORIAN (_Noctiluca_), MAGNIFIED 114 65. SECTION OF A SIMPLE SPONGE 116 66. DIAGRAMMATIC SECTION OF A PORTION OF A COMPLEX SPONGE 117 67. HORNY NETWORK OF A SPONGE, MAGNIFIED 118 68. _Grantia compressa_ 120 69. SPICULES OF _Grantia_, MAGNIFIED 120 70. _Sycon ciliatum_ 121 71. _Leucosolenia botryoides_, WITH PORTION MAGNIFIED 121 72. _Chalina oculata_ 122 73. _Halichondria panicea_ 123 74. SPICULES OF _Halichondria_, MAGNIFIED 124 75. AN OYSTER SHELL, BORED BY _Cliona_ 124 76. SPICULES OF _Cliona_ 125 77. THREAD CELLS OF A COELENTERATE, MAGNIFIED 127 78. THE SQUIRREL'S-TAIL SEA FIR (_Sertularia argentea_), WITH A PORTION ENLARGED 128 79. _Sertularia filicula_ 129 80. " _cupressina_ 130 81. THE HERRING-BONE POLYPE (_Halecium halecinum_) 131 82. _Tubularia indivisa_ 132 83. THE BOTTLE BRUSH (_Thuiaria thuja_) 132 84. _Antennularia antennia_ 133 85. _Aurelia aurita_ 135 86. THE EARLY STAGES OF _Aurelia_ 136 87. _Rhizostoma_ 136 88. _Chrysaora_ 136 89. _Cydippe pileus_ 137 90. SECTION OF AN ANEMONE 139 91. STINGING CELLS OF ANEMONE, HIGHLY MAGNIFIED 140 92. DIAGRAMMATIC TRANSVERSE SECTION OF AN ANEMONE 140 93. LARVA OF ANEMONE 140 94. THE TRUMPET ANEMONE (_Aiptasia Couchii_), CORNWALL; DEEP WATER 144 95. _Peachia hastata,_ S. DEVON 145 96. _Sagartia pallida,_ DEVON AND CORNWALL 146