. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 382 HENRY J. FRY. ' , -. .. • « «• .' . -• r. •' / whereas the peak of clear rays is usually at one hour. Since central bodies occur only when rays are clear and reach the center, they too show their optimum numbers at one hour, and ; are less numerous at one half and at two hours after activation. These relationships are shown in Graph I. The percentages of .60. SO. 40. .30. 20. 10. LO. A7/ -&-. \ GRAPH i. The effects of various intervals in the history of cytasters upon rays and central bodies. This graph is derived fr
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 382 HENRY J. FRY. ' , -. .. • « «• .' . -• r. •' / whereas the peak of clear rays is usually at one hour. Since central bodies occur only when rays are clear and reach the center, they too show their optimum numbers at one hour, and ; are less numerous at one half and at two hours after activation. These relationships are shown in Graph I. The percentages of .60. SO. 40. .30. 20. 10. LO. A7/ -&-. \ GRAPH i. The effects of various intervals in the history of cytasters upon rays and central bodies. This graph is derived from the data of Chart II., pp. 376-377. It shows the percentages of the various types of cytasters present at \ hr., i hr., and 2 hrs., after activation, when all the detailed experiments concerning the effects of modified activation are averaged together. A triangle is the symbol for \ hr. after activation, a circle for i hr., and a square for 2 hrs. Only cytaster types A, B, D and Ei occur, since the fixative used was sublimate acetic per cent. The graph shows that asters with vague rays (or none) usually occur in maximum numbers at \ hr. and at 2 hrs. after activation, whereas clear-rayed ones are most numerous at i hr. Also, the percentages of asters with central bodies follow the same sequence, indicating that the presence of central bodies is correlated with the presence of clear rays. For further details cf. p. 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 Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
Size: 1359px × 1839px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
