192 



BUSH 



(25) POTAMILLA Malmgren 1865 (restricted). 



Type, P. neglecta (Sars 1861) Malmgren 1865, figures, as first species. 

 Off Finmark, in 20-40 fms. 



Branchiae free. Inferior setae on thorax, below collar fascicle, sub- 

 spatulate in form, i. e., short, tapered, widest in middle. 



(26) ASPEIRA gen. nov. (Potamilla Malmgren 1865, in part). (See p. 202.) 



Type, A. modesta sp. nov., figures. Alaska. 



Branchiae free. Inferior setae on thorax, below collar fascicle, sub- 

 spatulate to oblanceolate in form, *. e., tapered, widest in middle, vary- 

 ing in length. 

 8. Collar with ends separated on back. 



Incisions or clefts ventro-lateral and ventral. 



Avicular uncini only in tori on both abdomen and thorax. 



(27) SABELLASTARTE Savigny 1809+ Saint-Joseph 1894. (See p. 186.) 



Type, 5. indica Savigny 1809, as first species, + Quatrefages 1865. 

 Indian Ocean. 



Branchial lobes comparatively small, spiral only in retraction. In- 

 ferior setae on thorax, below collar fascicle, lanceolate in form. Uncini 

 similar to those of Pseudopotamilla. 



(28) METALAONOME gen. nov. 



Type, M. marice (Lo Bianco 1893, as Bispira, figures). Gulf of Na- 

 ples. Branchial lobes spiral only in retraction. Inferior setae on thorax, 

 below collar fascicle, oblanceolate in form. 



(29) DASYCHONE Sars 1861 -f- Malmgren 1865 (restricted). 



Type, D. decora Sars 1861, as first species, = ? D. infarcta (Kroyer 

 1856) Malmgren 1865, figures. Coast of Norway. 



Branchial lobes forming equal spirals ; branchiae with outer append- 

 ages. Inferior setae on thorax, below collar fascicle, lanceolate in 

 form. 



Avicular uncini in tori on abdomen ; avicular uncini and pennoned setae in 

 tori on thorax. 



(30) SABELLA (Linne*) Malmgren 1865. 



Type, 5. pavonina Savigny 1809-}- Malmgren 1865, figures, as first 

 species. Coast of Norway, in 30-100 fms. 



Branchial lobes spiral only in retraction ; branchiae joined by mem- 

 branous web. Inferior setae on thorax, below collar fascicle, lanceolate 

 in form. 



(31) DISTYLIA Quatrefages 1865 {Bispira Saint-Joseph 1894). (See p. 183.) 



Type, D. volutacornis (Montagu 1804, figures) Quatrefages 1865, fig- 

 ures. South coast of Devonshire, England. 



Branchial lobes forming equal spirals. Inferior setae on thorax, below 

 collar fascicle, lanceolate in form. 



(32) SPIROGRAPHIS Viviani 1805. 



Type, 5. spallanzanii Viviani 1805, figures,-}- Claparede 1870, figures, 

 -f Saint-Joseph 1898. Gulf of Naples. 



Branchial lobes forming unequal spirals ; branchiae joined by mem- 

 branous web. Inferior setae on thorax, below collar fascicle, lanceolate 

 in form. 



