REVISION OF PILAR GIDAE — PETTIBONE 159 



Based on this revision, many pilargid species are recombined and 

 some species put into synonymy. Seven genera of Pilargidae are 

 herein retained: Ancistrosyllis (9 species), Sigamhra (9 species), 

 Pilargis (4 species), Cabira (4 species), Loandalia (2 species), Synelmis 

 (2 species), Otopsis (2 species). I have not included Telehsapia 

 Fauvel, with the questionable T. annandalei, or Hermundura Mtiller, 

 with the questionable H. tricuspis, except to place them both question- 

 ably under Loandalia Monro. Phronia Webster, preoccupied, is referred 

 to Pilargis. Kynephorus Ehlers and Glyphohesione Friedrich are 

 referred to Synelmis. Ancistargis Jones is referred to Ancistrosyllis. 

 Harpochaeta Korschelt is based on the larval form H. cingulata. For 

 each genus, a synonymy, diagnosis, list of species, and key to the 

 species are given. Where material was available for study, descrip- 

 tions and figures of some of the species are included. 



Descriptions are given for the following species (the 5 species of 

 pilargids from Chesapeake Bay are noted by asterisks): 



Pilargidae 



Ancistrosyllis breviceps Hartman Pilargis berkeleyae Monro 



Ancistrosyllis groenlandica Mcintosh Sigamhra bassi (Hartman), new combi- 

 Ancistrosyllis hamata (Hartman), new nation 



combination Sigambra grubii Miiller 



* Ancistrosyllis hartmanae, new species *Sigambra tentaculata (Treadwell), new 

 *Ancistrosyllis jonesi, new species combination 



Ancistrosyllis papillosa (Jones), new *Sigambra wassi, new species 



combination Synelmis albini (Langerhans), new 

 *Cabira incerta Webster, revised combination 



Loandalia fauveli Berkeley and 

 Berkeley 



POLYNOIDAE 



Podarmus ploa Chamberlin 



Family Pilargidae Saint-Joseph, 1899 



Body vermiform, cylindrical, somewhat depressed, or flattened, 

 ribbon-like. Integument smooth or papillated. Prostomium, tentac- 

 ular segment, and first setigerous segment more or less fused. Prosto- 

 mium usually small, inconspicuous, usually with antennae (3 to 0) ; 

 median antenna, when present, on posterior part of prostomium; with 

 pair of biarticulate palps consisting of large palpophores more or less 

 set off from prostomium and small palpostyles (filiform, button-like or 

 absent) ; ej^es usually absent. Tentacular segment achaetous, apodous, 

 with usually 2 pairs of tentacular cirri (rarely one pair or none). 

 Dorsal cirri of first setigerous segment often longer than following. 



