X 



TABLE OF CONTENTS. 



CHAPTER IV. 



PAGE 



PHYLUM COELENTERATA . 99 

 SUB-PHYLUM I. CNIDARIA . 123 



Class I. HYDRO-MEDUSAE 



(CRASPEDOTA) 123 



Order 1. Hydrida . .127 



,, 2. Hydrocorallinae . 127 



,, 3. Tubulariae . . 129 



Antliomedusae . 130 



,, 4. Campanulariae . 132 



Leptomedusae . 133 



,, 5. Trachomedusae . 135 



,, 6. Narcomedusae . 136 



,, 7. Sipb.onopb.ora. . 137 



Sub-order 1. Disconrmthac . 141 

 Section 1. Disconectae 



(Velellidae) 141 



Sub-order 2. SipJionanthac , 144 

 Section 1. Calyconectae 



(Calycophoridae) 144 

 ,, 2. Physonectae 



iPhysophoridae) 150 

 ,, 3. Auronectae . 153 



,, 4. Cystonectae 



(Physalidae) 154 



Class II. ACALEPHAE 



(ACRASPEDA) 156 



Order 1. Scyphomedusae . 162 



Sub-order 1. Xfiti/r<i>ii<:dusae 163 



,, 2. Pcromcdusae . 165 



3. CltlniitrtftiSflC . 166 



Order 2. Ephyroninae . .166 



Sub-order 1. Cannostoume . 167 



,, 2. Sc/Hostomac . 167 



,, 3. Ehvzostomae . 167 



Class III. ACTINOZOA 



(ANTHOZOA) 168 

 Order 1. Rugosa . . .175 

 ,, 2. Alcyonaria 



(Octactinia) 175 



Sub-order 1. Frotoalcyonaria 178 



,, 2. Stolonifera . 178 



,, 3. Alcyonacca, '. 178 



,, 4. rciiinitnlucca . 179 



Section 1. Penn;itnlr,-i . 180 



2. iSpicata . .181 



,, 3. Renillea . . 181 



,, 4. Veretillea . . 181 



Sub-order 5. Gorgonacca . 181 



Section 1. Scleraxonia . 182 



,, 2. Holaxonia . 182 



IV. COELENTERATA -o,it<l. 



PAOE 



Order 3. Zoantharia 



(Hexactinia) 183 



Sub-order 1. Actiniaria . 183 



Section 1. Hexactiniae . 18(5 



2. Paractiniae . 188 



,, 3. Protactiniae . 189 



,, 4. Edwardsiai- . 189 



,, 5. Zoantheae . . 189 



,, (3. Ceriautheae . 190 



Sub-order 2. Antipatliaria . 190 



3. Marlrcporaria . 191 



Section 1. Apo'rosa . . 194 



,, 2. Fungida . . 1P6 



: , 3. Perfnrata . . 19<J 



SUB-PHYLUM II. CTENOPHOEA 197 

 Order 1. Tentaculata . . 207 



Section 1. Cydippidae . 207 



2. Lobatae . . 207 



,, 3. Cestidae . . 208 



Order 2. Nontentaculata 208 



CHAPTER V. 



PHYLUM PLATYHELMINTHES . 209 



Class I. TURBELLARIA . 210 



Order 1. Acoela . .218 



,, 2. Rhabdocoela . . 219 



,, 3. Alloiocela . . 220 



,, 4. Triclada . . 221 



,, 5. Polyclada . . 222 



Acotylea . . 222 



Cotylea . . 223 



Class II. TREMATODA . . 223 



Order 1. Heterocotylea 



(Monogenea) 233 

 ,, 2. Aspidocotylea . 236 

 ,, 3. Malacotylea 



(Digenea) 237 



Dicyeiuidae and Orthonectidae 240 

 Class III. CESTODA . . 243 



CHAPTER VI. 



PHYLUM NEMERTEA . . 263 



Order 1. Protonemertini . 270 



,, 2. Mesonemertini . 270 



,, 3. Metanemertini . 271 



,, 4. Heteronemertini . 272 



