1914] Treaclwell: Polychaetous Annelids of the Pacific Coast 199 



Family ARICIIDAE 

 Nainereis longa Moore 



Nainereis longa Moore (1909a), p. 264. 



In his description Moore does not mention minute denticulations 

 which appear on the curved neuropodial spines. 



Collected from Neah Bay, Alaska ; Bolinas Bay ; Black Point, San 

 Francisco Bay ; Pacific Grove ; and Point Loma, San Diego. 



Nainereis robusta Moore 



Nainereis rolusta Moore (1909a), p. 262, pi. 8, figs. 34-37. 



These, which agreed in other respects with Moore's descriptions, 

 have the second somite continued forward to the posterior edge of the 

 mouth, thus dividing the "posterior ring" of the peristomium into 

 two parts. 



Collected from Black Point, San Francisco Bay; and Pacific 

 Grove. 



Scoloplos elongata Johnson 



Scoloplos elongata Johnson (1901), p. 412, pi. 10, figs. 105-110. 

 Collected from Salmon Bay and Port Orchard, Puget Sound; 

 Tomales Bay (entrance) ; and Coronado. 



Aricideopsis megalops Johnson 



Aricideopsis megalops Johnson (1901), p. 413, pi. 10, figs. 111-112; pi. 11, 

 figs. 113-114. 



Locality unknown. 



Aricia sp. (?) 

 Collected from San Diego, Coronado, and also in haul XLIIl-1, 

 in San Diego Bay in 3 to 7 fathoms on soft black mud. 



Family SPIONIDAE 

 Spio acuta sp. nov. 



PL 11, figs. 14-20 



This species is represented in the collection by two specimens, both 

 of which had lost their posterior ends. The length of the remaining 

 portion is twenty millimeters, and the width one and one-half milli- 

 meters. The head (pi. 11, fig. 11) has a very acute prostomium. The 



