. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 118 L. FRANCIS. Figure 1. Comparison of average-sized spirocysts from three anemone species lor specimens of the same size. In the living animals, the tubule end of the untired spirocyst capsule (pointing upward in these photographs) presses tightly against the external cell membrane, so that the everting tuhule is directed outward and away from the anemone during tiring. Tentacle spirocysts are from AnilmpU'iira xanthogrammica (A). Anlhopleuru eleganli\\una (Bl. and Teuliti crussicontis (Cl. Acrorhagial spirocysts are from
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 118 L. FRANCIS. Figure 1. Comparison of average-sized spirocysts from three anemone species lor specimens of the same size. In the living animals, the tubule end of the untired spirocyst capsule (pointing upward in these photographs) presses tightly against the external cell membrane, so that the everting tuhule is directed outward and away from the anemone during tiring. Tentacle spirocysts are from AnilmpU'iira xanthogrammica (A). Anlhopleuru eleganli\\una (Bl. and Teuliti crussicontis (Cl. Acrorhagial spirocysts are from the same specimens of A. .\iintliiiHnimitiicti (Dl and A. I'U't'iinri.'isima (E). Photographs \\crc taken using differential interference contrast at 1000X (oil immersion). Each anemone weighed approximately 10 g Scale bar 10 /nm. collected individuals of Antlioplcuni xanthogrammica and Tealia crassicornis (another sympatric, aclonal species). Specimens of A. xanthogrammica were selected to span the size range from within a single population that included very small juveniles. Specimens of T. criissicornix included freshly collected individuals from Anacortes. Washington (Shannon Point Marine Center |SPMC|) and a few very large individuals that had been kept in the laboratory for some years (at SPMC, Anacortes, WA, and the University of Washington Laboratories. Friday Harbor. WA). Tissue selection One medium-to-large tentacle was taken from each indi- vidual anemone. To reduce variability (Robson. 1988), I consistently examined only the proximal one-third of the largest tentacle for the size-graded series of anemones from a single clone. Acrorhagial tissue from the Anthopleitra species was obtained from the white tip that contains spe- cialized cnidae used only in aggressive interactions with other anthozoans. Spimcy.'it identification and measurement Untired spirocysts are easy to recognize in squash prep- arations of either fresh or preserved tissue. The capsule wall is unusu
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
