SABELLIDES AND SERPULIDES 189 



4^ Collar open on back, with one or more incisions or clefts 6. 



5. Collar with ends separated on back. 



Pectinate setae in tori on abdomen ; beaked setae in tori on thorax. 



(5) Fabricia Blainville 1828.1 



Type, F. fahricit (Muller) Fabricius 1780, figure. Greenland. 

 Branchial lobes small, bearing few branchiae with unequal, more or 

 less alternating, pinnae. Setae similar to those of Manayunkia. 

 Uncini in tori on abdomen ; beaked setae in tori on thorax. 



(6) Oria Quatrefages 1865 + Claparede 1870. 



Type, O. armandt {Claparbde 1874, figures) Quatrefages 1865 -f-Clapa- 

 rfede 1870 -f- Langerhans 1880, figures, + Saint-Joseph 1894, figures. 

 Gulf of Naples. 



Branchial lobes with branchiae similar to those oi Fabricia. Setae also 

 similar to those of Fabricia. Uncini somewhat similar in form to those 

 of Amp ha re fe or Amp hicieis Msilmgren 1865 (Ampharetea). 



(7) Oriopsis Caullery and Mesnil 1896.2 



Tjpe, O. metcknikoivi Caullery and Mesnil 1896, figures. St. Vaast- 

 la-Hougue, northern coast of France. 



Branchial lobes small, bearing few branchiae. Inferior setae on 

 thorax, below collar fascicle, lanceolate in form. Beaked setae some- 

 what similar in form to those in Jasmineira. Uncini somewhat similar 

 in form to 'Ocvo^q oi Artacama Malmgren 1865 (Terebellacea), with more 

 numerous teeth. 

 Uncini only in tori on both abdomen and thorax. 



(8) EuRATO Saint-Joseph 1894 (restricted). 



Type, E. -pyrrhogaster (Grube 1878,' figures) Saint-Joseph 1894, as 

 first species. Philippine Islands. 



Branchiae joined by membranous web. Inferior setae on thorax, 

 below collar fascicle, ' suboval ' in form. Uncini avicular in form. 

 5^. Collar with ends meeting, or in contact on back. 



Uncini in tori on abdomen ; beaked setae in tori on thorax. 



(9) Chone Kroyer 1856. 



Type, C. infundibuliformis Kroyer 1856 -f Malmgren 1865, figures, 

 and 1867, figure. Spitzbergen. 



Branchiae joined by membranous web. Inferior setse on thorax, 

 below collar fascicle, spatulate in form, i. e., short, rounded, widest in 

 middle or near upper end. 



(10) Megachone Johnson 1901. 



Type, M. aura?z^iaca Johnson 1901, figures. Puget Sound, 

 Branchiae joined by membranous web. Inferior setae on thorax, below 

 collar fascicle, lanceolate in form. Uncini similar to, or approaching 



^ Good figures are given by Bourne 1883 and Leidy 1884. 



2 Although the collar is described as rudimentary or wanting, and no figures 

 are given, this genus is placed here conditionally, as it is said to possess some 

 characters similar to those in Oria. 



*The collar is neither described nor figured with sufficient exactness for one to 

 determine its true character. 



