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Show 378 ACALEPllA· According to the observations of Messrs Audouin and Milne Edwards, the~e Medusre live in society, or at least are always met with collected in great numbers and swimming in the same direction with their body inclined obliquely. The CEPHElE, Per., are only distinguished from the other Rhizos-toma by having filaments intermixed with the dentations of the pedi-cleT( h1) e. CASSIOPElE have no pedicle, properly so called; their (usually eight) arms, which are sometimes ramous, arise directly from the inferior surface( 2 ). In other species, without a central mouth, we find none of those numerous ramifications in the pedicle, nor open cavities for lodging the ovaries. They might be united under the name of A sTOMA· Some however-LYMNOREA and FAVONIA, Pcr.-still have a large pedicle furnished on each side with fibrous filaments which may act as suckers. Others-GERYONIA, proper, Per.-are even destitute of these filaments, but have au infundibuliform membrane at the extremity of the pedicle, from the bottom of which vessels seem to arise that ascend into the pedicle and spread out through the umbella. One of them is found in the Mediterranean, the Med. probos-cidalis, Forsk., XXXVI, 1 ( 3). ORITHYIA, Per. Where that membrane is wanting( 4). (1) Medu8a cephtM, Forsk., XXIX; Encyc., XCII, 3, 4;-Med. octostyla, Id., XXX; Encyc., lb., 4;-Med. ocellata, Modeer., Nov. Act. Holm., 1791. • (2) Med. frorulMa, Pall., Spic., X, ii, 1, 3;-Med. octopus, Gm.; llorlasse, XXV, 16, 17;-Med. andromeda, Forsk., XXXI?-Med. corona, Id., p. I07?-Rltiz08toma kptopu8, Chamiss. and Eisenhardt, Ac. Nat. Cur., X, p. I, pl. xxviii, f. 1;-01188· borbonica, Delle Chiaie, Mem., I, tab. 3, 4. (3) Add Dianee Gabert, Zool., Freycin., pl. 84, f. 2; Geryonia tetraphylla, Cba· miss. and Eisenb., loc. cit. f. 2. (4) Medusa minima, 'Baster, Op. Subs., ll;-Dianee dubaul, Zool., Freycin.,pl. 84, f, 3, which is the Geryonie dineme, Per. It is possible that mutilated Geryoniot (which are often in that condition) may have been taken for Orythyi~. SIMPLICIA. 379 BERENxx, Per.(I) f Where there is no pedicle wh atevet· but h ace appears to be provided with I' ttl ' w ere the inferior sur-vessels( 2). 1 e suckers along the track of the EuDORA, Per. ' Vlhere not even suck ers are visible b t h are smooth and without any ' u w ere the two surfaces One species is found i;~:;e;; o:gans. Cuv.-about the size of a fiv f edite~ranean-Eudora moneta people. e- ranc piece, and so called by th~ When these simple animals bee surface becomes an interior one a odme more concave, their inferior stomach. They form the n may be considered as a true CARYBDEA, Per. Those ' in w hI' c h no traces of only differ from Jl1Jdra in . vessels can be perceived internall W J SIZe. Yt e should separate from the Med them by Linnreus from insuffi . us~~ certain genera united with Cient affinities. BEROE, Miill. Where the oval or globular . •:vered with filaments or a sort b~dt Is furnished with salient ribs t e. other, and in whi,s:h ramifi t~ ace, extending from one pole to a kmd of moti•O n resembling tcha Ito nfs of v esse1 s are perceptible and extrem1't y; m· those that have b a o a fl ~~'d . T he mouth is at one :ach that occupies the axis of t~enbexammed they lead into a stoi; e ~wo organs probably analogo: ody, and on the side< of which t e Medusre. Such is the s to those we have styled ovaries B. pileus; M. edusa pileus~ Gm ••' B aster, I, III' xiv' ui! , .... E 1 , ncyc. ((1 ) Cuvieri a cart·s ochroma, Pe · 2) Medma. mtl1'su ial' r., Voy. aux Terres Aust X Ptripltylla• p~~~ ;ron. 'P u, Gm., Plancus' Co nc h ., M.m.. , NoXt. X,I 2V. 5· ' • ,-Oarylxlea. |