44 University of California Puhlications in Zoology. [Vol. 4 



On the whole I should regard this species as more closely re- 

 lated to D. sargassicola Xjiard than any other, but Lahille ('90), 

 from later studies of this species, considers it as not specifically 

 distinct from D. cereum Giard, and from this latter our animal 

 differs in several important respects. 



Station 4420, east point of San Nicolas Island S. 77 °W., 3.8 

 miles, April 12, 1904, 33 fathoms, bottom fine gray sand. 



