Bulletin of the Museum of Comparative Zoology at Harvard College . RcHmn *1 % OS. ?/ msdm. niitlrm.^ tlidmuJtl ® .0\ ^ I ? (9. m^^: CBD if] Davenport. — Buddiug in Bryozoa. PLATE XII. ABBREVIATIONS. ecdrm. Ectoderm. jnsdrm. Mesoderm. ex. Outer layer of bud. oce. Ooeeium. i. Inner layer of bud. sto. Stolon. lu. gm. Lumen of the bud. Fig. 100. Longitudinal section of a larva of Plumatella polyviorpha, in which thetwo layers are established; tlie pole of ingression is directed upward,on the plate. Fig. 101. Section of upper part of zooecium of CristateUa mucedo, with its co
Bulletin of the Museum of Comparative Zoology at Harvard College . RcHmn *1 % OS. ?/ msdm. niitlrm.^ tlidmuJtl ® .0\ ^ I ? (9. m^^: CBD if] Davenport. — Buddiug in Bryozoa. PLATE XII. ABBREVIATIONS. ecdrm. Ectoderm. jnsdrm. Mesoderm. ex. Outer layer of bud. oce. Ooeeium. i. Inner layer of bud. sto. Stolon. lu. gm. Lumen of the bud. Fig. 100. Longitudinal section of a larva of Plumatella polyviorpha, in which thetwo layers are 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
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