160 PROCEEDINGS OF THE NATIONAL MUSEUM vol. us 



Parapodia subbiramous. Notopodia reduced to embedded notoacic- 

 ula in cirrophores of dorsal cirri, with or without additional capillary 

 setae or stout emergent acicular setae which may be straight or hooked. 

 Neuropodia cyHndro-conical, with embedded neuroacicula and simple 

 neurosetae (no compound setae, as in Hesionidae). Dorsal and ventral 

 cirri usually present. Pygidium usually with pair of anal cirri. 

 Proboscis unarmed, bulbous or long cylindrical, usually with circlet 

 of papillae around opening. Intestine usually with intestinal caeca 

 (at least in forms with well-developed parapodia) . Burromng forms. 



Key to the Genera of Pilargidae 



1. With internal notoacicula only or with additional fine capillary notosetae . 2 

 With stout emergent dorsal setae in addition to internal notoacicula ... 4 



2. Without antennae, tentacular cirri, dorsal or ventral cirri (small cirri may 



be present at terminal parts of neuropodial lobes but not in usual position), 

 Notopodia with projecting stout notoacicula and few slender notosetae. 



Body subcylindrical Loandalia Monro, p. 195 



With antennae, tentacular cirri, dorsal and ventral cirri. Notopodia with 

 internal notoacicula only. Body flattened, ribbon-hke 3 



3. Two small lateral antennae, without median antenna. Palps biarticulate, 



with small palpostyles. Ventral cirri short, conical. Integument minutely 



papillated Pilargis Saint-Joseph, p. 160 



Three small antennae, median and lateral. Palps indistinct, without pal- 

 postyles. Ventral cirri lamelliform. Integument smooth, not papil- 

 lated Otopsis Ditlevsen, p. 164 



4. Stout emergent dorsal setae straight, not hooked. Body subcyhndrical, with 



parapodia sharply marked off from body. Neurosetae capillary, hmbate. 



Integument smooth, not papillated Synelmis Chamberlin, p. 190 



Stout emergent dorsal setae hooked 5 



5. Body subcylindrical, with parapodia poorly developed. Dorsal and ventral 



cirri small or lacking Cabira Webster, p. 177 



Body elongate, depressed, with parapodia deeply cut. Dorsal and ventral 

 cirri distinct 6 



6. Prostomium small, inconspicuous, with antennae shorter than palps. 



Tentacular cirri short. Dorsal cirri of first setiger similar to or slightly 

 longer than following. Dorsal cirri short. Neurosetae longer to shorter, 

 with tips slightly bent, smooth, a,nd spinous. Integument papillated. 



Ancistrosyllis Mcintosh, p, 164 

 Prostomium larger, with antennae longer than palps. Tentacular cirri long. 

 Dorsal cirri of first setiger unusually long. Dorsal cirri long and slender. 

 Neurosetae with capillary tips. Integument smooth. 



Sigambra Miiller, p. 179 



Genus Pilargis Saint- Joseph, 1899 



Pilargis Saint-Joseph, 1899. [Type-species: P. verrucosa Saint-Joseph, 1899, by 



monotypy. Gender: feminine.] 

 Phronia Webster, 1879. [Type-species: P. tardigrada Webster, 1879, by monotypy. 



Gender: feminine. Preoccupied by Winnerz, 1863, in Diptera.] 

 Diagnosis: Body long, flattened, ribbon-like, with parapodia deeply 

 cut. Prostomium reduced, biarticulate palps with large ovoid palpo- 



