54 THE HYDROMEDUSAE 



exploded into numerous genera ; Staurostoma, Hkl. ; Laudivi\ Less., 

 [Lrt/oea] ; Melicertella, Hkl. ; Mclicertissa, Hkl. ; Meliccrtum, A. Agass. 

 [Meliceiiani]; Melicertidiiiiu, Hkl.; Orchistoma, Hkl.; Haiinomiaes, v. 

 Kenu. Family 2. Cannotidae. Genera — S(anrodi>iCHs, Hkl.; Gonynema,A. 

 Agas.s. ; PtyrluKjena, A. Agas.s. ; Stauraphora, Brandt ; Pulyorcli'is, A. Agass.; 

 Cannota, Hkl. ; Dijucannota, Hkl. ; Berenice, Per. et Lesueur ; Dipleurosoma, 

 'RoQck, = Ametranyia, AUni. ; Dicranocranna, Hkl.; Toxorchis, Hkl.; 

 iniletta, Hkl.; IVillsia (vulgo Jfillia, formerly cla.s.sed here, but an Antlio- 

 medusan), Forbes ; Proboscidactijla, Brandt ; Cladocanna, Hkl. Family 3. 

 EucoPiDAE. Genera — Eucopium, Hkl., \Clytia'\ ; Saphenella, HkL ; Eucope, 

 Gegenb., [? Campanularia + 1 Clytia]; Obeliu, Per. Lesueur, [Obelia']; 

 Tiaropsis, L. Agas.s. ; Euchilota, 'M'^Crady, = Thaumantias (liars , = Laodue 

 (pars); Phiulum, Hkl.; Phialis, Hkl.; Mitrocomiam, Hkl.; Epenthesis, 

 M'Crady, \Chjtia'\ ; Mitrocomella, Hkl. ; Phialidium, Leuck., = Thaiimantias 

 (pars.), [Campan 111111(1] ; Mitrocoma, Hkl.; Eutimium, Hkl.; Eutima, 

 M'Crady ; ScqjJienia, Escli.; EtUimeta, Hkl. ; Eutimalphes, Hkl. ; Odor- 

 chidiam, Hkl. ; Odorchis, Hkl. ; Odordiandra, Hkl.; Ireniam, Hkl. ; Irene, 

 Escli. ; Tima, Esch., [Tirna]. Family 4. Aequoridak. Genera — Odo- 

 canna, Hkl.; Zygocanna, Hkl.; Zygocannota, Hkl.; Zyyocannula, Hk]. ; 

 Halopsis, A. Aga.ss. ; Aequorea, Pel'. Les. ; Rlwgmatodes, A. Agass. ; Stomo- 

 hrachivmi, Brandt ; Staurohradiium, Hkl. ; Mesonema, Esch., = Zygodadyla, 

 Brandt, [Zygodactyla] ; Polycanna, Hkl., [Cavijutnulina]. 



(6). Hydroid Scheme. 



Family 1. Campaxulariidae. Genera — Campanidaria, Lanik., 

 [Thaiimantias (pal's i] ; Lovenella, Hincks [?] ; Obelia, Per. Lv&. [Obelia]; 

 Thyroscyphus, Allm. [?] ; Hypanthea, Allm. [S] ; Calycella, Hincks [S] ; 

 Lytoscyphus, Pictet [?] ; Gonothyraea, Allm. [S] ; Clytia, Lamx., [Eucope 

 {•paivs), + Epenthesis]; Campanidina, v. Bened., = iao7««?m, Lam.v., [Phia- 

 lidium + Polycanna']; Opercularella, Hincks [S] ; Calamphora, Allm. [S] ; 

 Hebella, Allm. [?J ; Halisiphonia, Allm. [S] ; Zygodactyla, Brandt, [Zygo- 

 dadyla = Mesonema]; Lcptoscyphus, Allm. [?J ; Obelaria, Hartlaub [S]. 

 Family 2. Perlsiphoxiidae. Genera — Perisiphonia, Allm. [?] ; Crypto- 

 laria, Busk [!] ; Lafoea, Ag;iss., [Laodice] ; Lictorella, Allm. [?] ; Cuspidelhi, 

 Hincks [?] ; Filelliim, Hincks [?]. Family 3. Haleciidae. Genera — 

 Halccium, Oki-n [S] ; Diplocyathns, Allm. [?] ; Ophiodes, Hincks [S] ; 

 llydreUa — [S] ; Haloikcma, Bourne [?]. Family 4. Sehtllariidai; 

 (gon()i)liores sessile throughfiut). Genera — Scrtnlaria, Linn, pai-s. ; 

 Diphasia, L. Agass.; Thiiiaria, Flein. ; Desmoscyphas, Allm.; Sertulairllit, 

 Gray; Hydrallmania, Hincks; Hypopyxis, Allm.; Staurotheca, Allm.; 

 Dictyocladiam, Allm. Family T). Aglaophemidae (gonophores juobably 

 sessile throughout). Genera — Aglaophenia, Lamouroux ; Acanthocladium. 

 Allm.; Lytocarpus, Kircheni), ; i:>treptocaidHs,A\\\n.; Diplocheil ns, AWm. : 

 Cladocarpus, Allm. Family 6. Halicornauiidae (gonoj)hores i)roliably 

 .sessile throughout). Genera — Halicornaria, Busk, paiu ; Axygoplon, Allm. 

 Family 7. Ioiidae. Genius — Idia, Lamouroux [S]. Family 8. Giu.m- 

 MARiiUAE. GeniLs — Grammaria, Stimps., = (?) Salacia, Lamouroux ['.]. 

 Family 9. Synthecidae. Genera — l^ynthccium, Allm. [/] ; lliccocladiuin, 



