Family ANTIGONARIIDAE Dorjes, 1%8 



Geaus Aniigonaria Dorjes, 1%8 



Antigonaria arenaria Dorjes, 1968. North Sea. From fine 

 sand, 5 m. 



FamUy CHILDIIDAE Dorjes, 1968 



Genus Actinoposthia An der Lan, 1936 



Actinoposthia biaculeata Faubel, 1974. North Sea. From 



coarse sand in swash zone, 6-9 m. 

 Actinoposthia caudata An der Lan, 1936. Greenland. 180- 



300 m. 

 Actinoposthia haplovata Dorjes, 1968. North Sea. From 



fine sand, 5 m. 

 Actinoposthia tonga Faubel, 1976. North Sea. In beach 



sand. 

 Actinoposthia pigmentea Faubel, 1976. North Sea. From 



sandy shallows or in sand to 10 cm. 



Genus Adeloposthia An der Lan, 1936 



One species A . elegans = Parapropors elegans. An der Lan 

 listed this as a species of "uncertain position" and Dorjes 

 (1968a) moved it into Paraproporus. 



Geaus Archactinoposthia Dorjes, 1968* 



Archactinoposthia pelophila D'oTJes, 196&. North Sea. Clay 

 and sand, 5 m. 



Genus Atriofronta Dorjes, 1968 



Atriofronta polyvacuola Dorjes, 1968. Fine to coarse sand, to 

 5 m. 



Genus ChUdia, 1910 



Childia baltica Luther, 1912 = Childia groenlandica. 

 *Childia groenlandica (Levinson, 1879). North Atlantic, 

 South Atlantic (Brazil), East and West coasts of the United 

 States, Mediterranean. Mud, algae, plankton, to 80 m. 

 Childia pansa Marcus, 1950 = Childia groenlandica. 

 *Childia spinosa Graff, 1911 = Childia groenlandica. 



Genus Microposthia Faubel, 1974 



Microposthia listensis Faubel, 1974. North Sea. In sandy 

 beach. 



Genus Paraphanostoma Steinbock, 1931 



Paraphanostoma brachyposthium Westblad, 1942. North 

 Sea. Common in dredge hauls. From muddy bottom, to 

 360 m. 



Paraphanostoma crassum Westblad, 1942. North Sea, Adri- 

 atic. From soft bottom, 10-130 m. 



Paraphanostoma cycloposthium Westblad, 1942. North Sea, 

 Adriatic. From soft bottom, to 250 m. 



Paraphanostoma dubium Westblad, 1942. North Sea to Ice- 

 land, Adriatic. From clay, 30-700 m. 



Paraphanostoma gracilis Westblad, 1945. North Sea. From 

 clay and sand, 5-60 m. 



Paraphanostoma macroposthium Steinbock, 1931. North 

 Atlantic to Iceland, Adriatic. Mostly from soft bottom, 

 to 22 m. 



Paraphanostoma submaculatum Westblad, 1942. North Sea, 

 Adriatic. From soft bottom, 5-180 m. 



Paraphanostoma trianguliferm Westblad, 1942. North Sea. 

 From mud, sand, and shell gravel, 25-400 m. 



Genus Paraproporus Westblad, 1945 



Paraproporus diovatus Dorjes, 1968. North Sea. In fine 



mud. 

 Paraproporus elegans (An der Lan, 1936). Greenland, 



Iceland. 

 Paraproporus rosettiformis Faubel, 1974. North Sea. In 



medium to fine sand in shallow water. 

 Paraproporus rubescens Westblad, 1945. North Sea, Adriatic. 



From mud, 5-20 m. 



Genus PelophUa Dorjes, 1968 



Pelophila cavernosa Dorjes, 1968 = Pelophila lutheri. 

 Pelophila lutheri (Westblad, 1946). North Sea to Iceland, 



Mediterranean. From clay or mud, to 120 m. 

 Pelophyla pachymorpha Dorjes, \968. North Sea. In coarse 



gravel. 



Genus Philactinoposthia Dorjes, 1968 



Philactinoposthia adenogonaria Dorjes, 1968. North Sea. 



From mud, 8 m. 

 Philactinoposthia diploposthia Dorjes, 1968. North Sea. 



Fine sand with some detritus, 5 m. 

 Philactinoposthia helgolandica Dorjes, 1968. North Sea. 



From coarse sand, 33 m. 

 Philactinoposthia pusilla (Westblad, 1946). North Sea. 



From sand and clay, 10-20 m. 

 Philactinoposthia rhammifera (Westblad, 1946). North Sea to 



Iceland. Occurs sporadically, 15-20 m. 

 Philactinoposthia saliens (Graff, 1882). North Sea, 



Mediterranean. From sand and mud, mostly shallow water. 

 Philactinoposthia stylifera (Westblad, 1946). North Sea. 



From clay with sand, 10-20 m. 

 Philactinoposthia viridis Dorjes, 1968. North Sea. From 



growth on an old shipwreck. 

 Philactinoposthia viridorhabditis Dorjes, 1968. North Sea. 



From fine sand. 



^In his key and definition of genera, Dorjes {1968a) lists a genus Proactinoposthia and a 

 species Proaclmoposrhia pelophila, but description of a species Archactinoposthia pelophila 

 is placed in position for this genus (p. 335) and it is so listed in Dorjes' (1968b) article on the 

 ecology of the acoels. 



Genus Proactinoposthia Dorjes, 1968 



Proactinoposthia pelophila Dorjes, 1968 = Archactinoposthia 

 pelophila. 



62 



