. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 188 G. O. MACKIE AND Q. BONE. FIGURE 7. .S". fusifonnis. hlastozooid : territories of anterior skin pulses ('spots) and left inner skin pulses (stipple). The salp has been opened up from the dorsal side and pinned out with the gill bar to the right. Muscles are shown only on left. The right inner skin pulse zone is the mirror image of the left (br represents brain; en, endostyle; ev, exhalent valve; gb, gill bar; iv, inhalent valve; ppb, peripharyngeal band). epithelium itself ( Fig. (>). Mere, a window was cut in th
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 188 G. O. MACKIE AND Q. BONE. FIGURE 7. .S". fusifonnis. hlastozooid : territories of anterior skin pulses ('spots) and left inner skin pulses (stipple). The salp has been opened up from the dorsal side and pinned out with the gill bar to the right. Muscles are shown only on left. The right inner skin pulse zone is the mirror image of the left (br represents brain; en, endostyle; ev, exhalent valve; gb, gill bar; iv, inhalent valve; ppb, peripharyngeal band). epithelium itself ( Fig. (>). Mere, a window was cut in the pharyngeal wall and a microelectrode was passed through it and inserted into the outer epithelium. Spikes recorded intracellularly from the epithelium correlated perfectly with events identi- fied as OSPs on other grounds. The epithelia are extremely thin. In electron micrographs of a young 5". fnsi- lorniis hlastozooid, the outer epithelium was found to he p. thick, the inner The intracellular recordings were made from an older specimen which • have had thicker epithelia, hut the tissues would still have heen relatively certainly less than 5 //, thick. Only three penetrations were made, all in the layer. The low resting potential (35 niV) and nonovershooting spike are indicative of cell injury. Penetration was only momentary. While these records serve to confirm the location of OSPs in the outer skin, the tissue is clearly. 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
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