PART III.

ANIMAL ORGANISMS.

SECT. PAGE

I. FUNCTIONS OF THE ANIMAL FRAME 1

II. PROTOZOA 13

III. HYDROZOA ZOOPHYTES 81

IV. ANTHOZOA ZOOPHYTES 119

V. ANNULOSA, OR WORMS 144

VI. ECHINODERMATA 169

VII. THE CRUSTACEA 188

VIII. CIRRIPEDIA 213

IX. BRYOZOA, OR POLYZOA 218

X. TUNICATA, OR ASCIDIANS 222

XI. MOLLUSCA 229

INDEX 253

ILLUSTRATIONS

TO

THE SECOND VOLUME.

FIG. PAGE

118. Galeolaria lutea (_Voght_) _frontispiece_ 86. Amœba princeps 14 87. Actinophrys sol 17 88. Acanthometra bulbosa } _to face_ 19 89. Eucyrtidium cranoides } (_Haeckel_)[A] _frontispiece to vol. i._ 90. Dictyopodium trilobum } _to face_ 20 91. Podocyrtis Schomburgi 20 92. Aulocantha scolymantha } _to face_ 21 93. Actinomma drymodes } (_Haeckel_) _to face_ 21 94. Haliomma echinaster } _to face_ 21 95. Simple Rhizopods 22 96. Gromia oviformis 26 97. Various forms of Foraminifera 28 98. Simple disk of Orbitolites complanatus 34 99. Animal of Orbitolites complanatus 34 100. Rosalina ornata (_Voght_) _to face_ 41 101. Section of Faujasina 45 102. Interior of the Operculina 46 103. Section of Sponge 59 104. Paramœcium caudatum 69 105. Kerona silurus 69 106. Noctiluca 73 107. Vorticellæ 76 108. Acineta 77 109. Thread-cells and darts 82 110. Hydra fusca 84 111. Syncoryna Sarsii with Medusa-buds 90 112. Thaumantia pilosella 92 113. Otolites of magnified Thaumantias 93 114. Development of Medusa-buds 95 115. Rhizostoma 98 116. Cydippe pileus and Beroë Forskalia 102 117. Praya diphys } _to face_ 103 118. Galeolaria lutea } (_Voght_)[B] _frontispiece_ 119. Apolemia contorta } _to face_ 108 120. Physophora hydrostatica } 109 121. The Physalia 112 122. Velella spirans (_Voght_) 115 123. Alcyonian polypes, highly magnified 120 124. Polype of Alcyonidium elegans 120 125. Spicula of Alcyonium digitatum 121 126. Red coral branch 126 127. Red coral greatly magnified 127 128. Tubipora musica 130 129. Actinian polype 131 130. Lobophylla angulosa 135 131. Nervous system of Leech 151 132. Foot of Naïs 152 133. Terebella conchilega 154 134. Pushing poles of Serpula 155 135. Foot of a Polynoë 160 136. Brachionus pala 163 137. Common Rotifer 167 138. Section of shell of Echinus 177 139. Sucker-plate of Sea-Egg 179 140. Section of a sucker-plate 179 141. Spine of Echinus miliaris 181 142. Pluteus of the Echinus 181 143. Larvæ of Echinus in various stages of development 182 144. Skeleton of Synapta 185 145. Wheel-like plates of Chirodota violacea 186 146. Ear of Crab 191 147. Section of a Crab 193 148. Young of Carcinus mœnas in various stages of development 195 149. Lucifer, a stomapod crustacean 200 150. Female Cyclops 205 151. Cypris 207 152. Section of Daphnia pulex 208 153. Balanus culcatus 213 154. Tentacles or feet of the Balanus 214 155. Section of Lepas anatifera 215 156. Development of Balanus balanoïdes 216 157. Lepas 217 158. Cells of Lepraliæ 219 159. Cellularia ciliata and Bugula avicularia 220 160. Magnified group of Perophora 222 161. Highly magnified Perophora 223 162. Ascidia virginea 225 163. Salpa maxima 227 164. Young of Salpa zonaria 227 165. Cardium or Cockle 230 166. Foot of Cockle 231 167. Section of shell of Pinna transversely to the direction of its prisms 233 168. Membranous basis of the shell of the Pinna 233 169. Section of nacreous lining of the shell of Avicula margaritacea (pearl oyster) 234 170. Tongue of Helix aspersa 237 171. Palate of Trochus zizyphinus 237 172. Granulated Trochus 238 173. Tongue of Limpet 238 174. Whelk 240 175. The Crowned Eolis 240 176. Tongue-teeth of Eolis coronata 241 177. Hyalæa and Clio 243 178. Clione borealis 243 179. Cuttle Fish 245 180. Arm of Octopus 247

Footnote A:

From Dr. Ernst Haeckel’s ‘Radiolarien.’

Footnote B:

From Voght’s ‘Syphonophores de la Mer de Nice’.

MOLECULAR AND MICROSCOPIC SCIENCE.