1914] Treadivell: Poly chaetous Annelids of the Pacific Coast 221 



Family SCALIBREGMIDAE 

 Sclerocheilus pacificus Moore 



SclerocJieilus pacificus Moore (1909a), p. 282, pi. 9, fig. 59. 



I have identified a number of specimens as belonging to this 

 species, though agreeing with Moore that they differ widely from the 

 type of the genus. I was unable to find the furcate setae which are 

 described and figured by Moore as characteristic of the species. 



Collected from Avalon, Santa Catalina Island. 



Family ARENICOLIDAB 

 Arenicola claparedii Levinson 



Arenicola claparedii Levinson (1883), p. 136. 

 Collected from Dutch Harbor, Unalaska; and Alki Point, Puget 

 Sound. 



Family SABELLIDAE 

 Sabella elegans Bush 



Sahella elegans Bush (1904), p. 194, pi. 26, fig. 2; pi. 27, fig. 6c; pi. 33, 

 figs. 20-21; pi. 34, figs. 1, 4, 5, 10; pi. 37, figs. 12-33. 



Locality unknown. 



Potamilla acuminata Moore 



Fotamilla acuminata Moore (1904), p. 159, pi. 12, fig. 41. 

 Collected in haul L-1, off San Diego on a rocky bottom in 21 to 

 28 fathoms; one specimen from an unknown locality. 



Myxicola pacifica Johnson 



Myxicola pacifica Johnson (1901), p. 431, pi. 19, figs. 193-198. 

 Collected from Santa Barbara, San Pedro, and also in the follow- 

 ing hauls : V-1, off San Pedro in 11 to 16 fathoms; XV, off San Pedro 

 in 4 to 7 fathoms on coarse sand ; XVI-2, off San Pedro in 9 fathoms 

 on small rocks and pebbles ; LXXXII-1, off Point Firmin in 27 to 30 

 fathoms on fine gray sand. 



Parasabella media Bush 



Parasabella media Bush (1904), p. 200, pi. 27, figs. 3-5; pi. 33, figs. 

 34-36; pi. 34, fig. 3; pi. 36, figs. 13-14; pi. 37, fig. 30. 



Locality unknown. 



