. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OBSERVATIONS ON HYDRA AND I'KLMATOHYDRA. 425 TABLE I. THE x MARK INDICATES THE DAY OF THE DEATH OF THE LAST HYDRA IN THE CULTURE. Existence in D;iys. 2 3 4 5 6 7 8 0 IO 1 1 12 13 X Brown hydra in pH ... X X X X X X X X X X X X X X X X X X X X X X X X X Green " " ... Brown " " Green . Brown " " .. Green . Brown " " Green " . Brown " Green ' " Brown ' " Green ' " Brown Green Brown ' ' Green ' ' Br
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OBSERVATIONS ON HYDRA AND I'KLMATOHYDRA. 425 TABLE I. THE x MARK INDICATES THE DAY OF THE DEATH OF THE LAST HYDRA IN THE CULTURE. Existence in D;iys. 2 3 4 5 6 7 8 0 IO 1 1 12 13 X Brown hydra in pH ... X X X X X X X X X X X X X X X X X X X X X X X X X Green " " ... Brown " " Green . Brown " " .. Green . Brown " " Green " . Brown " Green ' " Brown ' " Green ' " Brown Green Brown ' ' Green ' ' Brown ' ' . Green ' ' Brown . Green Brown Green ' ' Brown ' ' ' Green ' ' ' Brown Green . taken from the same culture or aquarium are placed in identical spring water cultures save for the concentration of the hydrogen ions and favorable reactions are repeatedly to be noted in the culture of low hydrogen ion concentration while unfavorable reactions are always to be noted in the culture of high hydrogen ion concentration, undoubtedly the pH of the culture must be a strong factor in determining this difference in the reaction- HISTOLOGY. The histology of reduction, dedifferentiation and resorption in Hydra has been observed by E. Shultz ('06) and \Y. Rehm ('25). Huxley and DeBeer ('23) also described histologically dediffer- entiation and resorption in Obelia and Campanularia. Our obser- vations are almost in exact agreement with those of the above. Studies on reduction, dedifferentiation and resorption always. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clare
Size: 1498px × 1667px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
