AEQUOREAD 2. 
Genus V. Sromopracnivum, Brandt (1838). 
Umbrella depressed or convex ; ovaries 8-12, linear, radiating on the surface of 
the sub-umbrella in the lines of the vessels. Margin with very numerous tentacula. 
Peduncle short, with lobed and fimbriated lips. 
Stomobrachium octocostatum (sp.), Sars. 
Plate IV, Fig. 1. 
Synonyms. Oceania octocostata. Sars, Besk. aj. Jagt., p. 24, pl. 4, f. 9 (1835). 
Melicertum campanulatum. Ehrenberg, Berlin Trans., 1835, pl. 8, f. 5-7. 
A quorea octocostata. Lesson, Acal., p. 312 (1843). 
Thaumantias Milleri. Landsborough, Arran, p. 265 (1847). 
Of all our British naked-eyed Meduse, I know least about the family to which the 
curious and elegant creature before us belongs. As yet we have only two members of it to 
record—this and a beautiful jelly fish discovered by Mr. Alder. ‘The latter I have never seen 
myself; the former I have not met with since my first season’s study of Meduse im 1839, 
when, though I made careful drawings of it, I did not examine its minute structure, trusting 
to meet with it again, as it seemed to be one of the most abundant of its tribe. Too often do 
we thus put aside unexamined what seems common and always at hand; too often do we 
regret our inattention when the opportunity is gone; and this with more serious subjects (some 
could add with objects even more beautiful) than Meduse. 
The genus Stomobrachium was constituted by Brandt for the reception of a Medusa 
presenting characters intermediate between Mesonema and A%quorea, and connecting the 
family of which the latter is the type with the Oceanide. The only species known to the 
Russian naturalist had been discovered and delineated by Mertens in the South Atlantic 
Ocean, near the Falkland Isles, in the month of January, 1827. 
In 1835, Sars described and figured a little Medusa of the Norwegian seas under the 
name of Oceania octocostata, with the diagnosis, “ Disco campanulato, ore plicato brachiis 
nullis ; intus canalibus 8 clavatis, cirris marginalibus longissimis.” He accompanied it bya 
fuller account in the Norwegian language. 
The same species had been excellently figured by Ehrenberg in 1835, under the name of 
Melicertum campanulatum (which had been applied in 1829 by Eschscholtz to a very distinct 
Medusa from the Pacific), apparently under the impression that the animal in question was the 
Medusa campanula of Otho Fabricius (Campanella Fabricii of Lesson). 
