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G.L.J. PATERSON AND A.G. GLOVER 



Fig. 1 SEMs of Sigambra magnuncus (MAP Discovery Investigations 

 12174#600.5 mm sieve, 1-3 cm) A. General view of individual. B. View 

 of notopodia, note the small capillary chaeta in each notopodium 



Prostomium rounded, slightly indented laterally at insertion of 

 palps and prostomium. Palps biarticulate with relatively long 

 palpostyles; palpophores fused distally over half their length. Three 

 antennae, median antenna longest, situated slightly posterior to 



Fig. 2 SEMs of Sigambra magnuncus (MAP Discovery Investigations 

 12174#80 0.5mm sieve, 1-3 cm) Dorsal view of anterior region. 



laterals in smaller specimens, but more level with them in larger 

 individuals. A pair of cushion like nuchal organs, situated on either 

 side of the median antennae. Eyes absent. Pharynx without jaws, 

 armed with eight equal size, slightly pointed papillae. 



Peristomium approximately twice as long as first chaetiger. Two 

 pairs of long tapering tentacular cirri, dorsal cirri longer than ventral, 

 and slightly shorter than median antennae. A row of low cushion- 

 like papillae (sense organs) extending across dorsal surface of 

 peristomium (may only be visible under high magnification). 



Fig. 3 a Parapodium from mid region, anterior view, b notopodial 

 hook, c & d neurocapillaries. Scale bars = 0.1 mm. 



