. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FORM REGULATION IN CERIANTHUS. 30/. B. One piece beginning to fill with water; others collapsed. C. One piece beginning to fill ; others collapsed. D. All collapsed. November i 2 : Five days after section : A. Marginal tentacular ridge distinct, with fading pigment. B. All distended ; new tissue at ends visible ; ten- tacular ridge forming. C. One piece distended ; new tissue at ends visible ; two pieces partly filled but not sufficiently to show the new tissue at the ends ; one piece still col- lapsed. D. All still collapse
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FORM REGULATION IN CERIANTHUS. 30/. B. One piece beginning to fill with water; others collapsed. C. One piece beginning to fill ; others collapsed. D. All collapsed. November i 2 : Five days after section : A. Marginal tentacular ridge distinct, with fading pigment. B. All distended ; new tissue at ends visible ; ten- tacular ridge forming. C. One piece distended ; new tissue at ends visible ; two pieces partly filled but not sufficiently to show the new tissue at the ends ; one piece still col- lapsed. D. All still collapsed. November 15 : Eight days after section: A. Marginal tentacles just appearing in all. B. One piece with marginal tentacles just appear- ing ; three pieces distended ; new tissue at ends visible ; tentacular ridge distinct, unpigmented. C. Two pieces distended ; new tissue at ends visi- ble; tentacular ridge forming ; one piece still col- lapsed ; one piece collapsed and completely enclosed in slime which was D. All still collapsed. November 20 : Thirteen days after section : A. Marginal tentacles in all I mm. in length. B. In one piece marginal tentacles i mm., in others about mm. C. All distended; tentacular ridge unpigmented, marginal tentacles just appearing. D. One piece beginning to fill, others collapsed. November 25 : Eighteen days after section : A. Marginal tentacles mm- showing faint traces of pig- mented bands in two pieces, in other two unpigmented ; labial tentacles mm. At aboral end new outgrowth 2 mm. B. Marginal tentacles 1—2 mm., some differences in length ap- pearing in individual pieces, unpigmented ; a few labial tentacles 1 The complete enclosure of pieces in slime, as in a cyst, often occurs when they remain collapsed for more than four or five days. The slime being secreted all over the ectoderm unites at the infolded ends and forms a complete cyst from which the piece is unable to emerge after a few days. D FIG. 2. '. Please n
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
