212 BUSH 



In some, eggs are seen through the integument along the abdominal 

 tori. 



A number of parasitic nematode worms were taken from the entire 

 length of one specimen which was dissected. They were twisted about 

 the spirally coiled intestine, filling the cavity on the sides of the segments. 



EUDISTYLIA PLUMOSA sp. nov. 

 pi. xxi, figs. 3, 4; pi. xxn, fig. 4, ; pi. xxxn, figs. 9, 15, 18, 19, 20, 22. 



Type locality. Sitka. 



Color in formalin, light brown, the branchiae banded with delicate 

 pink. The specimen is imperfect, there being but about 60 segments, 

 of which 8 belong to the thoracic region. On the abdomen they are 

 about twice as long as in the other related species, and well rounded. 



Branchial lobes forming spires of 3 full turns measuring in height 

 about 13 mm. without the branchiae, which are beautifully plumose, 

 long (about 22 mm.), very graceful, rarely divided, numbering about 

 135 in each lobe, arranged in a single series. 



Eyes small, few, scattered, being present on but a few of the rachises. 



Collar with very small dorsal lobes, increasing abruptly in height 

 from small lateral notches, arching upward and forward in a regular 

 curve to the conspicuous ventral ends. 



Dorsal furrow very deep on the first three segments, turns to the 

 right, passes diagonally across the eighth segment to the ventral region, 

 curves around the fascicle of setae of the first abdominal segment, and 

 merges into the ventral groove on the second. 



Length 4.5 inches; breadth at the end of thorax about 12 mm.; 

 length of thorax along setae about 13.5 mm. 



Sitka, one imperfect specimen with a tough, semitransparent, chiti- 

 nous tube. 



This species can be readily identified by its rounded, little-tapered 

 form, long and rounded segments, high collar, and very graceful and 

 plume-like branchiae. 



EUDISTYLIA ABBREVIATA sp. nov. 

 pi. xxiv, fig. 4; pi. XXXIH, figs, i, 2, 10, 18, 5; pi. xxxiv, figs. 13, 16. 



Type locality. Yakutat. 



Although similar in coloring to E. gigantea, this species is easily 

 recognized by the comparatively short, stout branchiae. Medium-sized 

 specimens (pi. xxiv, fig. 4) show a striking resemblance in form to 

 species of Schizobranchia. 



