. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. a. FIG. i. Diagrams of righting movements of a starfish having the radial nerves severed at the bases of all the arms. Arms attached to substratum are indicated by X- Arrow shows direction of turning. Experiment 2. (Specimen No. 14.)—-In eleven preliminary trials this animal righted itself in from one to five minutes, the average being minutes. In ten of the trials it turned on arms a + e. An incision was now made on the oral side at the base of each arm, severing not only the radial nerve and water canal, but also the m
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. a. FIG. i. Diagrams of righting movements of a starfish having the radial nerves severed at the bases of all the arms. Arms attached to substratum are indicated by X- Arrow shows direction of turning. Experiment 2. (Specimen No. 14.)—-In eleven preliminary trials this animal righted itself in from one to five minutes, the average being minutes. In ten of the trials it turned on arms a + e. An incision was now made on the oral side at the base of each arm, severing not only the radial nerve and water canal, but also the muscles and other internal organs, and leaving only the aboral arch of the external skeleton intact. It was now placed on its back in the water. It is unnecessary to give in detail the movements of the arms; it is sufficient to say that they at once began active but entirely uncoordinated 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: 1233px × 2026px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
