214 University of California Publications in Zoology [Vol. ls 



tentacles are very slender and one-third as long as the anterior setae. 

 They are apparently unequal in size and their exact number was 

 not easy to determine in preserved material. The palps are much 

 thicker than the tentacles and one-half as long as the longest one. 

 Each is provided with lobulated edges and a ventral groove. 



The anterior end is noticeably truncated dorsally, the truncated 

 portion being covered with a dense layer of sand grains. A much 

 thinner outer coating covers the remainder of the body, the papillae 

 being clearly seen through it. For about the first ten somites these 

 papillae form a fringe along the anterior border of each somite. 

 Farther back the papillae become less prominent and are distributed 

 over most of the surface of the somite. Larger papillae are arranged 

 so that those of successive somites form a row about midway between 

 the neuropodium and the mid-ventral line on either side. Another 

 series of papillae form an incomplete row on either side, ventral to the 

 others. On the ventral margin of the head there are about six 

 prominent papillae just ventral to the palps. The dorsal papillae are 

 essentially similar to the lateral and ventral ones, except that none is 

 especially prominent. Clumps of papillae accompany the setae tufts. 

 the largest forming a longitudinal row ventral to the neuropodium. 



The anterior neuropodial setae are slender and elongated, their 

 joints being six to eight times longer than broad. Farther back they 

 become exceedingly delicate, and are especially liable to be lost when 

 the sandy covering of the body is scraped away. The notopodial 

 setae are also very delicate at the anterior end of the body, but are 

 replaced by hooks at about the sixth somite. These are at first ar- 

 ranged in transverse rows of three or four, but the number becomes 

 smaller toward the posterior end. The hooks (pi. 12, fig. 33) are 

 pale yellow with smooth bases. Each gently curves toward its bluntly 

 rounded apex, and is without accessory processes. 



The type was collected from Santa Catalina Island. Others were 

 collected from Portuguese Bend; San Diego; and in haul L-1. off 

 San Diego on a rocky bottom in 21 to 28 fathoms. 



Type in the Museum of the University of California; co-type in 

 the American Museum of Natural History. 



Flabelligera infundibularis Johnson 



FJahelUgera infundilmlaris Johnson (1901), p. 417, pi. 12. figs. 124-127. 

 Collected from Yakutat and Kodiak Islands, Alaska; and Scow 

 Bay and other points in Puget Sound. 



