FIGURE 4. Anthopleura elegantissima. A in Intertidal sea anemones (Cnidaria: Actiniaria) from the west coast of the Peninsula of Baja California, Mexico

FIGURE 4. Anthopleura elegantissima. A) oral disc and tentacles. B) detail of acrorhagi. C) column with verrucae. D) pedal disc. E) cross section of column showing the retractor and parietobasilar muscles. F) longitudinal section of the distal column showing marginal sphincter muscle. G) longitudinal section of tentacle showing ectodermal muscles. (H–V) Cnidae. tentacles: (H) basitrich, (I) spirocyst; acrorhagi: (J) holotrich I, (K) holotrich II, (L) basitrich, (M) spirocyst; actinopharynx: (N) basitrich, (O) p-mastigophore A; column: (P) holotrich, (Q) basitrich; filaments: (R) basitrich I, (S) basitrich II, (T) p-mastigophore B1, (U) p-mastigophore A, (V) b-mastigophore. Abbreviations. acr: acrorhagi, dm: directive mesenteries, lm: longitudinal muscles, me: mesoglea, pbm: parietobasilar muscles, pd: pedal disc, rm: retractor muscles, sp: sphincter, t: tentacles, vr: verrucae. Scale bars: A–D: 20 mm; E–F: 500 µm, G: 200 µm; H–V: 20 µm.