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Show 384 AC.A.LEPHA· PnyssoPHORA, Forsk. These Acalepha are evidently allied to the Physalire, but their bladder is proportionally much smaller, has no crest, and is frequently accompanied by lateral bladders; their various and numerous tentacula are suspended vertically under the bladder, like a garland or cluster. In ' pgyssoPHoR.A, Per. Or Physsophora properly so called, between the superior bladder and the tentacula are other bladders placed side by side, or one on another, sometimes of an iTregular figure, and sometimes polyedrous, forming, by their union, prisms or cylinders. The tentacula partly conical, partly cylindrical, and partly formed by groups of threads or globules, and finally, partly filiform and susceptible of considera· ble elongation, form a cluster or garland at the inferior extremity( 1 ). HIPPOPUS, Quoy and Gaym. Where ther.e are merely lateral vesicles, almost semi-circular, or shaped like the foot of a horse, and crowded into two ranges, thus forming a sort of spike comparable to that of certain grasses, from duaa utriculus, Gm., Lamartiniere, Journ. de Phys., Nov. 1787, II, 13, 14;-Me. dusa caravella, Mull., Nat. of Berl., Besch., II, 9, 2, are Physalia:, but which do not appear to be sufficiently described to enable us to unite or distinguish them specifically, I will say the same of the Physal. pelagica, Bose., Vers, II, xix, 1, 2, and the Physalie megaliste, Per., Voy. I, xxix, 1. This observation will even apply to those of Tilesius, Voy. of Krusentst. and Lesson, Voy. de Duperr. Zooph., pl. 4. and 5, although better characterized, until we have more accurate observations of the changes which age or other circumstances may produce in the number of the(1 t)e nStauccuhl ais. the Physsophora l~ydrostatica, Gm. The individual named Phy&. mu.wnemct, by Per., Voy. XXIX, 4, is well preserved, tha\ of Forskahl, Ic., .xxxm, E, e, 1, e, 2; Encyc., LXX)IIX, 7, 9, appears to be the same species, but deprived of a portion of its tentacula, which are easily removed. I also think that the Phyuup"Mra rosacea, Forsk., XLIII, D, b, 2, and Encyc., LX~ XIX, 10, 11, is a mu· tila.ted specimen of another species. Add .Rhizophysa Ohamisscmis, Eisenb., Medus., Ac. Nat. Cur., X, pl. 35, f. 3!- Rhiz. helianthw, and Rhiz. mew, Quoy and Gaym., Ann. des Sc. Nat., X, pl. 5, and many other undescribed species. · HYDROST AT lCA . 3M wluch also depend 8 a. k'm d of garlau 1 tl parts. The united contraction of tl c lat ~rosses all the preceding move rapidly( 1 ). In lese veslcles enable the animal to CuPULITA, veTryh leo nvges aicxliess( 2a)r.e regularl y at t ached to the two sides of a frequently RAcEMIDA, Cu v. . Where all the vesicles are lob I mshed with a little b g u ar and small; each one l·s f . mem rane and th . ur-whlch moves by their J. O.m t con' tractionesy( are umted in an oval m 3). ass RHlzoPHYzA, Pet·. Where there are no lateral . l and an elongated stem I vesl~ cs but merely a superior bladder · ' a ong wh1ch th t some comcal and the others fil'~ ( e entacula are suspended 110rm 4). The ' STEPHANOMIA, Per. Appears to be a third co b' . wh'l C h 'm· Physsophora ro m mat10n ' w h ere the lateral bladders the te~tacula, extend al:.~ rt:rie~dhere to. the top of the stem abov; ofvarwus forms(5). o gth and mtermingle with tentacula (1) Quoyand Gaym., An. des Sc Nat . N.B. The Glebe ofOtto A N . ., X, pl. 10,4, A, f.l-12 of a Hippopus. ' c. at. Cur., XI, P· IT, pl. 42 f. 3 . . 1 . (2) V , . , lS mere y a vesicle oy. de Frey · (3) A em., Zool., pl. 87 f. 15 new gen tl ' . . .. (4) Physsophor:s r.om t~e Mediterranean. . ~ , , . has the Rhizo phyza .pflialinfoersmtotma,a F, oPresSk ., XXXIII' F.' Encyc., LXXXIX 12· th owever, think that thes . r., Voy., XXIX, 3. MM , ' esame their lateral bladd e Rhizophyzz are merely Ph h.' Quoy a?d Gaymard, (5) St h . ers. yssop ora: whtch have lost Lesueur ;e;p~ ~aenaolmrVzsa .11m. p ~t z' tr t·t t.S , Peron Vo X to me to appl·o:x:ima:e n~;.er ~~h 5. Thhe Stephanomia uvaria, . .-2 y yssop ora proper. |
