FIGURE 1
(A) Location Map.
(B) Nature of Burrow and Response to Tidal Variation. A — B, resting position; A1 — B1, defaecating position.
(C) External Features. An. — Anus, Br1 - Br13 — Branched gills, Chaet. annl-Chaet. ann19 — Chaetigerous annuli, Mth. — Mouth, Neph P1 - Neph P6 — Nephridiopores, Neurop — Neuropodium, Noto — Notopodium, No. chaet — Notopodial chaeta, Pros. — Proboscis, Se IV Segment IV (a1-a5 — annuli), Tail Seg. — Tail segment, V.M.L. — Ventral midline, A - A - T.S. — Fig. 2A, B - B - T.S. — Fig. 2C.
(D) External Features of Proboscis and Anterior Segments. Chaet. ann2 — Chaetigerous annulus II, Mth. — Mouth, No. chaet. — Notopodial chaetae, Nuch. p. — Nuchal pore, Pap. — Papillae, Pros. — Proboscis.
(E) Mature Ovum. Cyt. — Cytoplasm, Memb. — Outer Membrane, Nuc. — Nucleus.
(F) (1) Side View of Mature Sperm Plate. (2) Top View of Mature Sperm Plate. Sp. tails — Sperm tails.
(G) Transverse section through a parapodium. Br. fil — Gill filament. Circ. mm. — Circular muscles, Coel. — Coelom, Int. — Intestine, Long. mm. — Longitudinal muscles. Neurop. — Neuropodium, No. chaet. — Notopodial chaetae, No. chaet. sac. — Chaetigerous sac., Noto. — Notopodium, V.M.L. — Ventral midline.