REVISION OF PILARGIDAE — PETTIBONE 



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to antennae and crescent-shaped areas posterior to lateral antennae 

 (fig. 15a). Tentacular segment longer than following segment, with 

 2 pairs of tentacular cirri similar to lateral antennae. Dorsal cirri of 

 first setiger longer than following ones, similar to and longer than 

 median antenna. 



Figure 13. — Sigamhra grubii (figures taken from Miiller, 1858): a, dorsal view anterior 

 end; h, parapodium; c, notopodial hooked seta. 



Parapodia subbiramous ; notopodia low, conical, with notoaciculum 

 curving distally; stout, hooked, emergent notoseta beginning on 

 setiger 4. Dorsal cirri wide basally, tapering distally, extending be- 

 yond setal lobes. Neuropodia conical, with neuroaciculum and nu- 

 merous simple neurosetae. Neurosetae variable in length, longer ones 

 smooth, capillary, shorter ones spinous with fine tips. Ventral cirri 

 slender, subulate, shorter than setal lobes, lacking on setiger 2. Py- 

 gidium with 2 long anal chri. Proboscis with 14 papillae around 

 opening, with additional basal papUlae irregularly distributed. 



Small specunens apparently of this species from Port Aransas, Tex. 

 (14 to 23 setigerous segments, fig. Ibe) agree generally with the larger 



