REVISION OF PILARGIDAE — PETTIBONE 



179 



bilobed, without anal cirri. Proboscis cylindrical, 3-ringed, with large 

 papillae around opening of distal ring and few scattered micropapillae, 

 with thickened cuticle in basal ring forming longitudinal ridges of 



Figure 11. — Cabira incerta: a, general outline of complete specimen; b, dorsal view posterior 

 end; c, lateral view anterior end with proboscis extended. 



jagged spines. Integument mostly smooth, with few scattered papillae. 

 Sometimes pigmented areas dorsal to tentacular chri and ventral to 

 neuropodia on first 2 setigers (fig. lie). 



Distribution: Chesapeake Bay, Va. In 7 fms. 



Genus Sigambra Miiller, 1858 



Sigambra Mtiller, 1858. [Type-species: S. grubii Miiller, 1858, by monotypy. 

 Gender: feminine.] 



