Text-book of comparative anatomy . paired, but it is afterwards atrophied on one side, FIG. 24S.— Longitudinal section through a and emerges at the base of the caudal mature sacculina carcini externa, at right anglesfin. Two receptacula seminis, entirely to the plane of symmetry (after Delage). co, Cloacalseparate from the female genital appar- aperture ; sp, sphincter of the u<-a (.•?) ; g, gangliun ;atus occur on the under side of the «•• outer integumental lamella, covering the brood1 , ,, cavity ; nt, female genital atrium, into which the un- paired portion (uov) of the ovary and the ce
Text-book of comparative anatomy . paired, but it is afterwards atrophied on one side, FIG. 24S.— Longitudinal section through a and emerges at the base of the caudal mature sacculina carcini externa, at right anglesfin. Two receptacula seminis, entirely to the plane of symmetry (after Delage). co, Cloacalseparate from the female genital appar- aperture ; sp, sphincter of the u<-a (.•?) ; g, gangliun ;atus occur on the under side of the «•• outer integumental lamella, covering the brood1 , ,, cavity ; nt, female genital atrium, into which the un- paired portion (uov) of the ovary and the cement Cirripedia. — The strikingly lobate glands (cd) enter ; in, brood cavity, sin. mi empty toovaries are paired in the Balanidcc, the left, with egg sacs (es) containing the developingand lie deep down in the shell ring eggs to the right; #00, the paired part of the ovary;(Fig. 207, p. 304) in that part of the inner inte^ntel lamella cov-rinK the body proper or visceral sac ; p, stalk entering the aperture. body cavity which extends into themantle fold. the sheU carapace (cp) of the host ; w, attachments In the Lepadidic (Fig. of the roots on the stalk ; da, central lacuna of the205, p. 303) the ovaries, which are to stalk continued into the lacunse of the outer inte-u-some extent united, lie in the anterior mental lamella the roots etc ^presenting the body IT <-• c AT i j 11 i cavity; £, testes. cephalic portion ot the body called the peduncle. In both the Balanidcc and the Lepudidn- the terminal division of theoviduct emerges on a projection on the basal joint of the anterior pair of tendril-like 374 COMPABA TIVE ANA TOM Y CHAP. feet. This position deserves special notice, because the sexual apertures in no otherCrustacean lie so far forward. In the Ehizoccphala (Fig. 248) the ovaries, in the shape of two lobate unitedmasses, fill the greatest part of the visceral sac of the body which corresponds withthe head of other Cirripcdcs. They open on each side int
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectanatomycomparative
