HYDROZOA AND CTENOPHORA. 
Ccel. 12 
OctorcJiidium, g. n., p. 195, for 0. tetranema, sp. ii., p. 19G, pi. xi i. fig. 9, 
= Octorchis ietranema, Hseck., Corsica. 
Octorchandra^ g. n., p. 197, for 0. germanica^ Hsock., = Octorchis ger- 
manica, Hacck. (1877), = Tima species, Schulze ; 0. canariensis, sp. n , 
p. 198, pi. xiii. fig. 1, Lauzarote, and 0. variahilis, Hscck., = Eutima 
variahilis, MacCrady, Al. Ag., = Octorchis variahilis, Haeck. (1877). 
Subfam. iv. — Irenidoe, Hsock. 
Irenium, g. n., p. 199, for I. quadrigatum, sp. n., p. 199, pi. xi. figs. 12 
& 13, West Coast of Africa. 
Tima teuscheri, sp. n., p. 306, pi. xii. figs. 3-5, = Irene teuscheri, Ho 3 ck., 
Brazil, 3° N., 25" W. 
^'' Fam. 8— JEquor[e]ida3, Eschs. (1829). 
Subfam. i. — Octocannidae, Haeck. (1877). 
Octocanna, g. n., p. 213, for 0. octonema, sp. n., p. 213, = Octocanella 
octonema, Haeck., Red Sea, 0. qiolynema, sp. n., Indian Ocean, Singapore. 
Subfam. ii. — Zygocannida9, Hrock. (1877). 
Zygocanna, g. n., for Z. costata, sp. n., p. 214, pi. xv. figs. 7 & 8, New 
Guinea, Z. pleuronota, sp. n., p. 215, = JEquorea pleuronota, P<5ron & 
Lesueur ; Polyxenia pleiironota, Eschs. (diagnosis of previous observers 
altogether insufficient), N. Coast of Australia. 
Zygocannota, g. n., p. 215, for Z. purpurea, Ilaeck., = JEquorea pur- 
purea, P^r. & Les., Milne-Edwards, L. Ag., = Polyxenia purpurea, 
Eschscholtz. 
Zygocannula, g. n., p. 216, for Z. diploconus, sp. n., p. 216, pi. xv. fig. 6, 
= Zygocanna diploconus, Haeck., Indian Ocean, Schmidt ; Z. undulosa, 
Haeck., = undulosa, P^ron & Lesueur, = Polyxenia undulosa. Less., 
= Zygocanna undulosa, Haeck. (1877). 
Subfam. iii. — Polycannidae, Haeck. 
ZEquorea discus, sp. n., p. 219, = ZEquoranna discus, Haeck., Messina. 
Staurohrachium, g. n., p. 224, for S. stauroglyphum, Haeck., = JSquorea 
stauroglypha, Per. & Les., = Laodice stauroglypha, L. Ag. (1862), =s 
jEquorea forlesiana, Gosse, == Rhegmatodes forhesianus, L. Ag. (1862), =s 
Staurohrachium forhesianum, Haeck. (1877). 
Mesonema eurystoma, sp.^n., p. 227, = Mesonella eurystoma, Haeck., 
Adriatic Sea. 
Polycanna, g. n., p. 229, for P.fungina, sp. n., p. 229, pi. xiv. figs. 4-7, 
= Rhacostoma funginum, Haeck., Norway, Christiansand ; P. germanica, 
op. n., p. 230, pi. xiv. figs. 1-3, = Crematostoma germanicum, Haeck. ; P. 
italica, Haeck., = Crematostomum italicum, Haeck., == ZHquorea italica, 
Per., = rissoana, Risso, Della Chiaje ; P. vitrina, Haeck., = 
vitrina, Gosse, = Zygodactyla vitrina, L. Ag., Hincks, = udE. allanto- 
phora. Per. & Les., L. Ag., = Zygodactyla allantophora, Haeck. (1877) ; 
P. grcenlandica, Haeck., = grosnlandica, Per. & Les., = Zygodactyla 
groenlandica, L. Ag., Al. Ag., = Medusa ccquorea, Fab., = M. glohularis, 
Modeer, = MS. glohularis, Morch, = Rhacostoma atlantidum, L. Ag. ; P. 
cressa, Haeck., = Zygodactyla cressa, Al. Ag. ; P. flava, Haeck., Cre- 
matostoma flava, A. Ag., Al. Ag., = Zygodactyla flava, Haeck, (1877), 
