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Show 380 ACALEPIIA. XC, 3, 4. Body spherical and with eight ribs; two ciliated tcntacula susceptible of great elongation issuing from its infe· rior extremity( 1 ). It is very common in northern seas, and even in the British channel; the Whale is said to feed on it(2). Naturalists have referred to the same genus, simple speciesIDYA, Oken-which are merely in the form of a sac furnished with ciliated ribs and open at both ends(3). Some-DoLIOLUM, Otto-are even destitute of rib~, their form re· sembling that of a barrel without a bottom( 4). The CALLIANIR1E, Per. only seem to differ from Beroe by having much more projecting ribs united in pairs forming two species of wings. Their internal organization is not yet well known(s). The TANIR..£, Oken, appear to approximate to Callianira, but they are figured, on each side, with three long ciliated ribs, and two long ramous filaments~ 6). The ALorNoEs, Rang., have a cylindrical body, open at one ex· tremity and furnished at the other with two large wings, which, when (1) According to Messrs Audouin and Milne Edwards, there exists, in the axis of these animals, a cavity extending from one pole to the other, and communi· eating externally by means of an inferior opening, which may be considered as an anterior mouth. In the superior third of this cavity is contained, and, as it were, suspended, a sort of straight and cylindrical intestinal tube, whose exterior orifice is exactly at the superior pole, bearing two granular strings-the ovaries ?-on each side. The cavity is filled with a liquid in motion, which may be seen passing into two lateral tubes, that are soon divided into four branches, and reach the surface of the body, by opening into longitudinal canals which conduct the ftuid into the cilia that are constantly in motion, and appear to be organs of respiration. Fi· nally, from the lateral parts of each of these eight costal canals, arise an infinity of little transverse vessels or sinuses, which establish a communication between them, and dip into the surrounding parenchyma. On each side of the spheroid, and internally, are two small masses, each of which occupies the bottom of a cavity or cul.de-sac, and gives rise to a long con· tractile filament; these two filaments issue through two circular openings, situated near the inferior third of the body. They are afterwards divided into numerous branches. (2) Add Beroe novem·costatus, Brug.; Bast., loc. cit., f. 5, and Encyc., XC, 2. The Beroe ovum, Fab., Groenl., 362, does not seem to differ from the pileus. ( 3) The Beroe ovatus, Brug., or Medusa infundibulum, Gm. ; Brown, Jam., XLffi, 2, and Encyc., XC, 1;-Beroe macrostomus, P~r., Voy., pl. :xni, f. 1;-Beroe ovata, capensis, punctata and constricta, Chamiss. and Eisenb., Ac. Nat. cur., X, P· i, pl. xxx andxxxi. N.B. The animal of Martens, Spitzb., pl. P, f, b, which is considered asidenti· cal with that of Brown, should rather be approximated to the first subgenus. {4) Doliolum mediterranBum, Otto, Ac. Nat. Cur., XI, p. U, pl. xlii, f, 4. (S) Oallianira didiploptera, P~r.; Ann. du Mus., XV, pl. ii, f. 16. (6) Bero"t haagone, Hrug.; Encyc. Vers, pl. 90, f. 6. SIMPLICIA. folded over c 1 · 381 . ' omp etely envelope it. Its c r . ';'Ith four_ ~rojecting ribs terminatin . y m~rlcal portion is flanked lines of Ciha(l). g m a pomt and marked b fi Th 0 y ve . . e OYROEs, Rang., have a simila b . ctha, but without ribs and . '1 : ody Wlth four ranges of WI' th _two C.i h. ated point's (2). slmi ar wmgs eac h f urm.s hed at base It IS also near the Beroes that we .must place the CEsTuM, Lesueur A ' . . very long gelatinous riband one of With a double row of cilia. th ' whose margins is furnished edge, but are smaller and l'e ey are also apparent on the inferior · fi · ss numerous I · · m erior margin that we find th • tIs m the middle of the e mouth a 'd a sto~ac_h placed transversely in th 'l . WI e aperture opening into termmatmg by a very small e t uckness of the riband, and vessels which traverse both e:~us. . ~rom the anal extremity arise probably ovaries, open on th r~dtnlties of the riband. Two sacs may b e compared to a C 11'e S•l es •o f the mouth . This animal' 1 a Iamra With t · e ongated wings. The only spec' k w? ribs, and excessively 0. veneris, Lesueur, Nouv.I~ull~~wn IS the !· 1. Its length, or ratherwidt • des Sc., June 1813, pl. v, mches in height It I'nh b' h, exceeds five feet, and it is two d'ffi · a Its the Med't I cult to preserve entire(3). I erranean, and is very . The two following genera wh. h With the Medusm mi ht 1 ' ~c were formerly joined 0 d g a so constitute II . . r er, on account of th . a sma family In this th . e Internal carfl . e gelatmous substance of the body. I age whiCh supports PoRPITA, Lam. Wher_ e this cartilage . centric strire crossed Ibsy criarcduialatirn gan sdtr iitrse . suTrfhac e mar~ed with con-e superior surface is 1, (2l.) .!l.lci'TUJe vermiculata' Ra ng., Mem. de la Soc d'H' t N (2) 0 . ts • at. de Par. IV ,; ... cyro" m z ' ' ....... , The oat/ . acu ata, Id. lb., xx, 1, 2;-0c fi xui, £ s, ~~~~;~:~~~?~a, Chamiss. and ~is:~: ~~-3 ~0c. crystal/ina, lb., 4. (3) The Lem . y orm another subgenus a . Cur., X, P· JJ, pl. a fi nzsque, Quoy and G . ragment of a Cestum · aym., Zool. de Preycin. ' pl· 86' f.· 1, 1. sperhaps |
