CONTENTS. 



VOLUME I. 



Introduction i~4 



Synopsis of Genera of the Hydromedusas 5-16 



Medusae Milleporinae 16 



Anthomedusae 17-196 



Genera of the Anthomedusae: 



Pachycordyle 21 Zancleopsis 91 Podocoryne 135 



Amaithasa 22 Pteronema 92 Turritopsis 143 



Pennaria 23 Eleutheria 93 Oceania 146 



Trichorhiza 28 Mnestra 96 Stylactis 149 



Steenstrupia 29 Ctenaria 98 Thamnostylus 151 



Hybocodon 37 Cladonema 98 Thamnitis 152 



Microcampana 44 Dendronema 102 Lymnorea 153 



Dicodonium 44 Protiara 105 Bougainvillia 155 



Sarsia 47 Heterotiara 107 Nemopsis 172 



Stnuridiosarsia 64 Stomotoca 108 Rathkea '75 



llydrichthys 66 Dissonema 115 Chiarella 182 



Eucodonium 68 Pandea 116 Bythotiara ..185 



Ectopltura 68 Turns I2O Sibogita 186, vol. 2 4QI 



Corynitis 71 Conis 130 Niobia 187 



Slabberia 73 Calycopsis 130, vol. 2 491 Proboscidactyla. . . . . . 188 



Margelopsis 80 Cytsis ... , : . .-...- ... 132 Willsia . . 193 



Zanclea 85 



Leptomedusae '..'.' .196-230 



Genera of the Leptomedusae: 



Thaumantias 198. Staurodiscus 213 Dichotomia m 



Laodicea 201 1'tvchogena 214 Dipleurosoma 224 



Melicertum 207 I'olyorchis 218 Toxorchis 228 



Melicertissa 209 Spirocodon 219 Netocertoides. . . .229 



Orchistoma 21 r Cannota 221 Monobrachium. . --230 



Timoides . . ..212 Cuvieria 221 



