REVISION OF PILARGIDAE — PETTIBONE 



169 



with low inflated notoacicular lobes, with very small conical dorsal 

 cirri, much shorter than neuropodial lobes, with prominent stout 

 emergent hooks beginning on setiger 6 (4-7, according to Hartman). 

 Neuropodial lobes short, truncate, w^ith retractile conical neuroacicular 

 lobes, with bundle of about 7 simple neurosetae. Neurosetae variable 



Figure 4. — -Ancistrosyllis breviceps (from holotype): a, dorsal view anterior end; b, ventral 

 view anterior end; c, middle parapodium; d, neurosetae. 



in length, faintly serrated, with tips slightly hooked, tips may be 

 faintly bifid (according to Hartman, neurosetae of 2 kinds, slender, 

 capillary and stouter, with bifid tips). Ventral cirri small, conical, 

 beginning on setiger 3. Pygidium? Proboscis? With intestinal 

 caeca. Integument with rather thick cuticle, with scattered minute 

 papillae. 



Distribution: Southern California. In 12 to 721 fms. 



