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REPORT ON ZOOLOGY, MDCCCXLII : 
yellow, with red centres ; tentaculiferous glands four, red and yellow, 
with pink tentacula ; umbrella in part pilose. — H. hritannica, Forb. : 
stomachal appendages as long as the proboscis, four, equal, yellow ; ten- 
taculiferous glands four, red and white, with white tentacula ; umbrella 
smooth. — H. octopunctata, Sars. : stomachal appendages shorter than 
proboscis, four, unequal ; tentaculiferous glands eight, black ; umbrella 
smooth. 
Forbes had added four new species of Thaumantias, found in the 
British Seas, to the four species previously made known by Eschscholtz 
and Sars, viz.: — Th.pileata: umbrella cap-shaped, oral peduncle and 
clubs of the vessels pink ; proboscis four-cleft at the mouth, lobes acute ; 
eyes large, black and yellow, on the bulbous origins of the twenty tenta- 
cula. — Th. Thompsonii : umbrella hemispherical, very convex ; proboscis 
four-cleft, lobes triangular ; clubs of the vessels, proboscis, and bases of 
tentacula yellow; eyes minute, black, on the triangular bases of the 
sixteen tentacula. — Th. punctata: umbrella hemispherical, clubs and 
proboscis pink ; proboscis four-cleft, lobes sub-acute ; eyes large, black, 
on the bulbous bases of the thirty-two tentacula. — Th. sarnica : um- 
brella hemispherical, clubs and proboscis bluish ; proboscis four-cleft, 
lobes acute ; eyes ? tentacula twenty. 
Mrs. Davis has described a very small Medusa, under the name of 
Cyancea coccinea (ibid. p. 235). She kept it for several weeks alive in 
a glass. Its form is campanulate, translucent, with four faint rays ; in 
the centre a red ball, with four white arms, forming a cross ; at the 
margin of the disc numerous tentacula. The editor of the Annals 
regards this Medusa not as a Cyancea, but rather as a species of Oceania, 
allied to 0. cacuminata, Esch. 
Bud. Wagner has published a very interesting contribution to the 
knowledge of the structure of the Pelagia noctiluca (Uber den Bau der 
Pelagia Noctiluca und die Organisation der Medusen, 1841). He men- 
tions also the presence of Medusce in the Gulf of Villafranca, the general 
vital phenomena of the Pelagia noctiluca, their luminous and urticating 
qualities (Arch. 1841, i. p. 38) ; and holds, that all the Medusce belonging 
to the genera Aurelia, Cyanea, Pelagia, Oceania, and Cassiopeia are 
bi-sexual. Separate sexual organs have also been recognised by Kolli- 
ker, in Rhizostoma Cuvieri, Chrysaora isoscela, and .Mquorea hen- 
leana. It is rather strange, that Ehrenberg will not admit, that the 
discovery of separate sexes in the Medusa is proved (ibid, 1842, i. p. 67). 
He says, that it is a thing unheard of, that the organization of the 
male and female of an animal species should be the same, not merely in 
form, but even to the anatomy of the sexual parts. No one has ever 
asserted such a resemblance. The male and female individuals of the 
Medusa aurita are neither in external form, nor in the intimate structure 
of the sexual parts, alike in the grown state. The females have a 
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