"292 — 
e. p. (68). Еисоре (medusa) Gegenbaur e. p. (70); L. Agassiz 
(3); Obelia Peron et Lesueur (151 teste Hincks'o 31, ali sque- 
autoribus), M'Crady (55) 1. Agassiz (3) Allmann (15); 
Hincks (91); Markanner—Tourneretscher (131), Lendenfeld 
(121); Laomedea Levinssen e. p. (124); Marktanner—Tourne- 
retscher (132), Birula (32, 33). 
Descriptio: Hydrothecae diaphragma et corpusculis chiti- 
neis instructae, pseudodiaphragmu destitutae. KReproductio per 
medusas vagantes generum Obelia et Еисоре. 
OBELIA GENICULATA L. 
Fig 19. 
» Knotted-tread Coralline“ Ellis (62); Sertularia genicu- 
lata Linn. (125, 126); Pallas (149); Lamark (112, 113); 
Laomedea geniculata Lamouroux (115); Johnston (103); Gosse 
(72); Campanularia geniculata Fleming (67); Monopyxis geni- 
culata, Ehrenberg (61); Еисоре diaphana, A. Agassiz (2), 
L. Agassiz (3); Obelia geniculata Almann (15); Ewcope alter- 
nata А. Agassiz (2); Obelia geniculata Hincks (91); Marktan- 
ner-Tourneretscher (131); Versluys (211); Lendenfeld (120); 
D'Arey Thomson (179); Clemens Hartlaub (79, 201); Millen 
Coughtrey (54); I. E. Duerden (59); Whinter (185); Nutting 
(147); Thornely (210). Bonnevie (195), Bétencourt (193). 
Laomedea geniculata  Levinssen (124). 
Obelia geniculata: Meresckowsky (135); Schlater (170); 
Knipowitez (107), Schydlowsky (169) Laomedea geniculata: 
Birula (32). 
Descriptio: ut Hincks'i. Addendum est: diaphragma magne 
incrassata. 
Forma universe dispersa esse videtur, a maribus austrinis 
(Mare Australe, Lendenfeld; Nova Zelandia, M. Cougthrey); 
usque ad septentrionales. hemisphaera occidentali ac orientali. 
Regione  arctica: Groenlandia, (Levinssen) Mare Barrents'i 
(W. Thomson); Mare glaciale (Bonnevie 196). 
Forma Mari Albo frequentatissima, habitat Zona secunda 
suprema, semper Laminariis affixa, quibuscum interdum usque 
ad infimas zonae secundae patet. 
Marktanner-Tourneretscher in collectaneis , Wiener Hofmu- 
seums* varietates tres descripsit; forma tamen Solovetzkiana 
varietatem aut variationem nullam repraesentat. 
