44 HARTMAN 



mud and sandy mud in 6-12 fathoms and was further reported and 

 redescribed from western Europe (Eliason, 1920, p. 58, fig. 17; Thulin, 

 1921, pp. 3-9, figs. 1-6, and Wesenberg-Lund, 1950, p. 34, pi. 8, fig. 36) 

 but with some differences. The original species was said to have two 

 buccal segments lacking parapodia, the long median tentacle inserted 

 on the second setigerous (or fourth visible) segment, and the prostomium 

 without eyes. Specimens from western Europe are said to have a single 

 buccal segment; the long median tentacle is inserted on the second 

 setigerous (third visible) segment, and the prostomium has a pair of 

 eyespots. Whether these differences are specific or the result of fixation 

 cannot be ascertained without examination of collections from Maine 

 to determine if they agree with the original account. 



Another species of the genus has been found abundant in the soft 

 bottoms of San Pedro Basin, California. This differs from the Atlantic 

 specimens in having two buccal segments, the median tentacle on the 

 third setigerous (fifth visible) segment, and the prostomium without 

 eyespots. 



Cossura Candida, new species 

 Plate 1, figs. 1-5 



Cossura, nr. longicirrata [sic] Hartman, 1954, p. 11 



Cossura n.sp. Hartman, 1955, p. 172 



Collections: Many specimens have been reported earlier in the quan- 

 titative samples from San Pedro Basin, California, in 6 to 440 fms. 

 The greatest number of individuals in a single sample (more than 250) 

 came from Los Angeles Outer Harbor, in 7 fms. 



Length of larger or adult individuals is 7-8 to 10 mm ; width is 0.5 to 

 0.7 mm in the anterior region ; segments number 50 to 75. The prosto- 

 mium is a depressed conical lobe, a little longer than wide, and lacks 

 eyespots. The first two visible segments are apodous (fig. 1). Parapodia 

 are biramous from the first segment and lateral in position; the two 

 rami are so near together that the setae of a side seem to form a single 

 continuous series (fig. 3). The median tentacle is long and cylindrical 

 and is inserted on the middorsum of the third setigerous segment (fig. 1). 



Setae are best developed in the anterior third of the body behind the 

 insertion of the tentacle. Notopodia have up to 6 to 8 pairs of setae in 

 bi-serial arrangement, with a row of shorter ones in front alternating 

 with a row of longer ones behind. Neuropodia have about 6 to 8 pairs 

 of shorter setae. All are stiff, distally pointed, and very spinous along 



