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PROCEEDINGS OF THE NATIONAL MUSEUM 



The genus Sigamhra either has been overlooked or has been con- 

 sidered to be indeterminable (Hartman, 1947, p. 483; 1959, p. 195). 

 The original figures and brief description of S. grubii from Santa 

 Catharina Island off Brazil seem to be sufficiently good to allow the 

 genus to be retained. I have included on page 182 the figures and 

 description of Miiller for S. grubii. 



Figure 12.^ — Cabira incerta: a, parapodium from setiger 8; h, same, from setiger 18; 

 c, dorsal view anterior end; d, ventral view anterior end; e, parapodium from setiger 40. 



Diagnosis: Body long, flattened, with parapodia deeply cut. Pro- 

 stomium with 2 biarticulate palps, 3 antennae longer than palps. 

 Tentacular segment achaetous, more or less fused to prostomium and 

 first setigerous segment, with 2 pairs tentacular cirri. First setigerous 

 segment with longer pau-ed dorsal cirri. Parapodia subbiramous. 

 Notopodia with notoacicula and stout emergent hooked setae. Dorsal 

 cirri long, slender, or flattened leaflike, extending beyond neuropodia. 



