Journal of morphology . l connecting the indusium with thehead ; pel., procephalic lobe ; lb., labrum ; 0., stomodasum ; at., antenna ; ,tritocerebral segment; , mandibular segment; ,^ first maxillary segment. Fig. 17. Median transverse section through the indusium while still a simplethickening of the blastoderm (serosa). X 230. s., serosa; , portion of indu-sium with normal nuclei; ««., shrunken nuclei; 7171.^ less shrunken nuclei; d.,thickened periphery of the organ ; v., yolk. Fig. 18. Median transverse section of the indusium while the amnioserosalfold is closing over
Journal of morphology . l connecting the indusium with thehead ; pel., procephalic lobe ; lb., labrum ; 0., stomodasum ; at., antenna ; ,tritocerebral segment; , mandibular segment; ,^ first maxillary segment. Fig. 17. Median transverse section through the indusium while still a simplethickening of the blastoderm (serosa). X 230. s., serosa; , portion of indu-sium with normal nuclei; ««., shrunken nuclei; 7171.^ less shrunken nuclei; d.,thickened periphery of the organ ; v., yolk. Fig. 18. Median transverse section of the indusium while the amnioserosalfold is closing over the disk. X 230. Letters as in Fig. 17. Fig. 19. Median transverse section through the indusium after the completeclosure of the amnioserosal folds. X 230. a/71.,^ outer indusial layer ; , innerindusial layer ; ««., shrunken nuclei. Fig. 20. Median transverse section through the indusium just after it hasbegun to spread. X 230. Letters as in the preceding figures. iourmtl of Morpholoyif. \ ol. \ 111 PL II. /. • * m #^- /y. n ? /2. /? t ^ w 76. /,5. /jr .. |t
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Keywords: ., bookautho, bookcentury1800, bookdecade1890, booksubjectphysiology
