Bulletin of the Museum of Comparative Zoology at Harvard College (1891) (14597312107)

Identifier: bulletinofmuseum22harv (find matches)

Title: Bulletin of the Museum of Comparative Zoology at Harvard College

Year: 1863 (1860s)

Authors: Harvard University. Museum of Comparative Zoology

Subjects: Zoology

Publisher: Cambridge, Mass. : The Museum

Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

Text Appearing Before Image:

re established; tlie pole of ingression is directed upward,on the plate. Fig. 101. Section of upper part of zooecium of CristateUa mucedo, with its containedlarva. Showing the formation of tiie stolon at the pole of Ingression and the attachment of this pole to the placenta-like neck of theooeeium (*). X 390. Fig. 102. Section through an ocecium of CristateUa, with its contained larva. Onepolypide is already established, and a second is arising. The twoare the only buds in tiie larva. On the left of the older bud thestolon is seen to be intruding itself between the ectoderm and meso-derm of the larva. X 390. Fig. 103. Section through the two oldest polypides of the CristateUa larva, to-gether with the stolon. This larva contains one other less developedbud at one side of these two. X 390. Fig. 104. Plumatella po!i/n:orpha. Stage of first bud later than that shown inFigure 96, exhibiting pore of invagination closed by overgrowth ofectoderm. X 390. Davenpor-T. -Budding inBryozoa. PlXII.

Text Appearing After Image:

BMesel.lith.Boston. Bulletin of the Museum of Comparative Zoology AT HARVARD COLLEGE. Vol. XXir. No. 2. THE GASTRULATION OF AURELIA FLAVIDULA, Per. & Les. Bt Frank Smith. With Two Plates. CAMBRIDGE, U. S. A.: PRINTED FOR THE MUSEUM December, 1891. Bulletin of the Museum of Comparative ZoologyAT HARVARD COLLEGE. Vol. XXII. No. 2. THE GASTRULATION OF AURELIA FLAVIDULA, Pee. & Les. Br Fkank Smith. With Two Plates. CAMBRIDGE, U.S.A.: PRINTED FOR THE MUSEUM. December, 1891. No. 2. — The Gastrulation of Aurelia Jlavidula, Per. S Les.By Fkank Smith.i Preceding the appearance of Goettes (87) publication in 1887 uponthe development of Aurelia aurita and Cotylorhiza tuberculata, the gas-trulation of Aurelia had been regarded, in the light of the studies ofKowalewsky, Haeckel, Claus, and others, as the result of invagination orat least of a process nearer to invagination than to any other method ofgastrulation. Goettes work seemed to show, however, that, instead of an invagina-tion, th

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1891

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