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. 

 , 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 -\- 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, 6". pavonina Savigny 1809 -f- 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 {Bisptra 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, S. spallanzanitYWxdinX 1805, figures, + ClaparMe 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. 



