Medusae of the world . T73n. 3i6. 3H. Figs. 311 and 312 — Cunina globosa, after Eschscholtz. Figs. %W and 314.—Cunina campanulata, after Eschscholtz. Fig. ? lativtnirh, after Gegenbaur, in Zeit. fur wissen Zool., Bd. S. Fig. proboscidea. After Metschnikoff, in Arbeit. Zool. Inst. Wien. Metschnikoff, 1886, and Woltereck, 1905, find that amoeboid, neutral germ-cellswander out from both the male and female gonads of Cumna proboscidea These amoeboidcells then beain to divide in the entodermal pouches and substance of the sub-umbrella After this process of division
Medusae of the world . T73n. 3i6. 3H. Figs. 311 and 312 — Cunina globosa, after Eschscholtz. Figs. %W and 314.—Cunina campanulata, after Eschscholtz. Fig. ? lativtnirh, after Gegenbaur, in Zeit. fur wissen Zool., Bd. S. Fig. proboscidea. After Metschnikoff, in Arbeit. Zool. Inst. Wien. Metschnikoff, 1886, and Woltereck, 1905, find that amoeboid, neutral germ-cellswander out from both the male and female gonads of Cumna proboscidea These amoeboidcells then beain to divide in the entodermal pouches and substance of the sub-umbrella After this process of division these cells fuse with one another, so that one ot the. 37- Fig. 317 A. Radial section through a tentacle and its peroniun Lobianco. Cunina proboscidea. Drawn by the author, from sections of a medusa collected at Naples by Dr. B. Radial section through a sense-club and its otoporpa. I figures ectodermal nuclei are shown as black dots while entodermal are circles. Cav, indicates the outer extremityof the perradial stomach-pouch, em, the solid cord of entoderm at the bell-margin in the place of the nng-canalwhich is here absent, m,, entoderm. «, exumbrella. gon, gonad, oc, sensory-club, otp, otoporpa. p, (, tentacle, o, v%.-Cunina vilrea, after Gegenbaur, in Zeit. fur wissen. Zool., Bd. 8 = C. proboscdeaf 478 MEDUSAE OF THE WORLD. component cells incloses the other. The inclosed cell then divides and develops into anembryo, while the enveloping cell becomes very large, sends out pseudopodia-like processes,and serves apparently only for the attachment, locomotion, and nutrition of the embryo. Theembryo gr
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectcnidari, bookyear1910
