. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BIOLOGICAL STUDIES ON CORYMORPHA. 2QI ditions, such buds arising on heteromorphic pieces become holdfast The-e fact- indicate that while the origin of the bud depends upon a degree of disorganization in the original physiological system, its fate depends upon a secondary physiological coordi- nation with the hydranths between which it develops. The bud .11 quires 'In- distinctive character of a holdfast, namely, its adhe- siveni ss, indi-pendent of any influence of tin- -ul-tratum. It has ;i pointed out already that a hydran
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. BIOLOGICAL STUDIES ON CORYMORPHA. 2QI ditions, such buds arising on heteromorphic pieces become holdfast The-e fact- indicate that while the origin of the bud depends upon a degree of disorganization in the original physiological system, its fate depends upon a secondary physiological coordi- nation with the hydranths between which it develops. The bud .11 quires 'In- distinctive character of a holdfast, namely, its adhe- siveni ss, indi-pendent of any influence of tin- -ul-tratum. It has ;i pointed out already that a hydranth at one end of a pi i profound influence upon the differentiation that may occur al the other end, depending on its own -ta^e ot dc\ elopim-nt and it- di-tance from that end. In the V ligim--, then, there i- a de\ eloping region between the two hy- whose differentiation is con- trolU-d to some extent by them. An intere-ting case of the coordination of parts in a -hort piece developing as a Y figure, i- represented in Fig. 15. A m-u axis ai ri-Jit angles to the original Fjc a\i- ha- IMI n established. And the orientation of gonads and tentacles—especially the latter i- dearly a resultant of the redistribution of forces correlated \\ith that ( liange. l-'i--ion may be considered as a special case of budding, depend- ing upon the length of the heteromorphic piece in\ol\ ed. A- the piece It 11-1 hen- the tendency to bud vanishes, until the e ha- been ob-er\ed. Ju-t a- il ua- from |-elaii\el\ -hort heteromorphic piece- only that the re\er-al- de-cribcd in the pre\ ion- -cctioii were obiained, the proximal elements (>f tlu- longer jiiece- failing to produce holdfa-'- at the \\oiind, so it ha- been only in the -horter heteromorphic pieces thai llie column between the hydranth- ha- -ho\\ n any sign budding, con-triciinn or fni-iule Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - col
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
