NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 83 



that the branchial filaments do not number more than 4, and the frontal 

 antennae were said to be close together; no other data were cited. This 

 reference is therefore questionably referred herewith. 



Distribution. — O. vexillaria has heretofore been known only through 

 its original discovery, off San Diego, California, in 243-468 fms, and 

 questionably off Lower California, in 475 fms (Treadwell). The present 

 records extend from San Nicolas Island, California, south to Chacahua 

 Bay, Oaxaca, Mexico, in a bathymetric range of 8 to 240 fms. 



Genus NOTHRIA Malmgren 

 Type N. conchylega (Sars) 



The species of this genus form a natural group with those of Onuphis 

 (above) and differ only in having branchiae that are simple filaments 

 that are rarely absent. Although this character may have no phylogenetic 

 significance, it is believed to have practical value in breaking up the large 

 genus, Onuphis, and for this reason is herein maintained. 



The following species appear to be referable to Nothria. 



1. N. abranchiata Mcintosh (1885, p. 314) from the Antarctic, 

 abyssal. 



2. 'N. armandi Mcintosh (1885, p. 330) from the Subantarctic, 

 abyssal. 



3. N. cobra (Chamberlin) (1919, p. 300) from the Pacific Panama, 

 in 1,772 fms. 



4. A^. conchylega (Sars), p. 85. 



5. A^. crassisetosa (Chamberlin) (1919, p. 295) from the Pacific 

 Panama, in 581 fms, and the Galapagos Islands, in 395 fms. 



6. A^. elegans (Johnson), p. 88. 



7. A*^. fragilis (Kinberg) (1865, p. 561) from off the La Plata River. 



8. N. geophiliformis (Moore) (1903, p. 445) from off Japan and the 

 north Pacific. 



9. A^. gorgonensis (Monro) (1933, p. 80) from Gorgona Island, in 

 20 fms. 



10. TV. hiatidentata Moore (1911, p. 259) from off San Diego, Cali- 

 fornia, in 1,059 fms. 



11. N. holobranchiata (Marenzeller) (1879, p. 132) from Japan. 



12. A^. iridescens (Johnson), p. 87. 



13. N. lepta (Chamberlin) (1919, p. 290) from the Pacific Panama, 

 in 1,270 fms. 



14. AT. macrobranchiata Mcintosh (1885, p. 320) from Japan, in 

 345 fms. 



