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PROCEEDINGS OF THE NATIONAL MUSEUM 



first setiger similar to following. Parapodia subbiramous, with dorsal 

 and ventral cirri subequal, subulate to oval with acuminate tips. 

 Notopodia with 1-2 notoacicula and stout, emergent, straight or 

 slightly bent, acicular notosetae, beginning on setiger 5-20 (difficult to 

 detect, not emergent at first). Neuropodia short, cylindrical, with 3 

 neuroacicula and bundle of neurosetae. Neurosetae limbate, tapering 

 to capillary tips, limbate part sometimes appearing frayed or finely 

 spinous (they break easily and the shorter broken setae may appear to 



Figure 21. — Synelmis albini {a, from specimen from Dry Tortugas, Fla.; b-d, from small 

 specimen from Old Tampa Baj', Fla.): a, dorsal view posterior end; h, outline of young 

 specimen; c, lateral view anterior end; d, posterior parapodium of same (setiger 75), 

 with two emergent neuroacicula. 



be forked, fig. 20^). Pygidium rounded, with pair of anal cutI 

 similar to dorsal and ventral cirri. Proboscis long, cylindrical, muscu- 

 lar, without papillae. Without intestinal caeca. Extra well- 

 developed, dorsolateral and ventrolateral longitudinal muscles and 

 diagonal muscles (figs. 19c; 20(7). Integument with thick, smooth, 

 iridescent cuticle extending on bases of dorsal and ventral cirri, 

 without papillae. Color (preserved) : yellowish to reddish, dark 

 brown, iridescent, with reddish glandular areas at bases of parapodia. 



