196 BUSH 



There are about 90 segments in the largest specimen, of which 8 

 belong to the thoracic region. 



Branchial lobes small, considerably developed ventrally, each bearing 

 about 22 rather long branchiae, which are connected by a basal mem- 

 brane ; the rachises taper gradually toward the extremity, which often 

 bears a short, very delicate terminal filament ; their two thin outer 

 edges are considerably developed and turn outward, especially near the 

 tip ; their pinnae are moderately long, exceedingly slender, and gradu- 

 ally decrease in length. 



Eyes single or in pairs on nearly all of the brown color spots, which 

 number from 5 to 8 on different branchiae. 



Length 75 mm. ; breadth at base of thorax 10 mm. ; length of 

 thorax along setae about n mm. ; length of branchiae about 19 mm. 



Kadiak, July 3, three J specimens. 



One specimen was taken from its tube, which is very thin and flex- 

 ible, of a dark purplish brown color, with a coating of very fine gray 

 sand. 



SABELLA FORMOSA sp. nov. 



pi. xxvn, fig 63; pi. xxxin, fig. 32; pi. xxxiv, figs. 14, 21 ; pi. xxxv, figs. 7, 25, 

 30; pi. xxxvi, figs. 25, 32. 



Type locality. Berg or Glacier Bay. 



A large species, similar in size and form to S. leptalea, of a beauti- 

 ful pink color, the branchiae of a deeper shade, with large brown 

 spots varying in number from 3 to 7 and not evenly spaced, as in S. 

 elegans. 



In the largest specimen, which is distended with eggs and not very 

 well preserved, there are about 70 segments, of which 8 belong to the 

 thorax. 



The branchial lobes arch well forward ventrally, the free portion 

 forming noticeable spirals when unexpanded. The branchiae, about 

 29 in each lobe, not counting 4 or 5 undeveloped ventral ones, are 

 comparatively long and slender, with closely crowded, very long and 

 slender pinnae, which decrease abruptly, leaving relatively short thin 

 ends. Eyes of good size, arranged in pairs on some but not all of the 

 brown spots. 



Collar simply rounded at the ventral fissure, without angular lobes, 

 often with spots of brown at the bases of the noticeable lateral clefts. 



Length of largest specimen about 100 mm. ; branchiae 23 mm. ; 

 breadth at base of thorax about 10 mm. Length of smallest specimen 

 about 47 mm. ; breadth about 7 mm. 



Berg or Glacier Bay, June 10, four specimens, dredged. 



