. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RnC FIGURE 1. Semi-diagrammatic sketches of Spirocodon saltatrix. A is a part of the umbrella obtained by cutting along the broken line in B. In A, the velum is shown lying across the subumbrellar surface. The two nerve rings, the inner and the outer, which run circularly along the velar base, are omitted in order to avoid undue complexity. In B, the tentacles of the middle part are cut out. C shows a longitudinal section through the radial streak. Abbrevia- tions used are: Ect, ectoderm; End, endoderm; Mes, mesogloea; NR, n
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. RnC FIGURE 1. Semi-diagrammatic sketches of Spirocodon saltatrix. A is a part of the umbrella obtained by cutting along the broken line in B. In A, the velum is shown lying across the subumbrellar surface. The two nerve rings, the inner and the outer, which run circularly along the velar base, are omitted in order to avoid undue complexity. In B, the tentacles of the middle part are cut out. C shows a longitudinal section through the radial streak. Abbrevia- tions used are: Ect, ectoderm; End, endoderm; Mes, mesogloea; NR, nerve ring; Oc, ocellus; Rd C, radial canal; Rd S, radial streak; Rn C, ring canal; Sph M, sphincter muscle; Te, tentacle; Ve, velum. For explanation, see text. We have found various types of pulses, some possibly neural (narrower in pulse duration than any reported for hydroids) and some myonal, which occur both spontaneously and in response to electrical and photic stimulation. For reader's convenience, abbreviations and characteristics of the pulses recorded are tabulated in Table I. METHODS Specimens of the anthomedusa Spirocodon , 5-7 cm in bell diameter, were collected from the Seto Inland Sea and kept in running sea water in a. 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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