SABELLIDES AND SERPULIDES 1 95 



Color white, with the branchiae tinged with pink and conspicuously 

 spotted with dark purple, forming bands. 



Number of segments about So, of which 8 belong to the thorax. 



The branchiae number about 22 in each lobe, not counting the 3 or 

 4 small ones at the lower or ventral end. They are about 16 mm. 

 long, broad and flat on the back, with the membranous edges ruffled 

 and very conspicuously developed along their distal portions. 



Eyes in pairs, situated in the color spots, so that they are not readily 

 found. 



. Length of figured specimen 2.25 inches ; breadth at base of collar 

 about 7.5 mm. ; length of thorax along setae 7 mm. 



Kadiak, July 3, four specimens. 



This species closely resembles Sabella crassicornis Sars, as figured 

 by Malmgren (1865), but has more numerous branchiae and color 

 spots. It is easily distinguished from the other species of this region 

 by the regular arrangement of the color spots on the rachises and the 

 extending of the color onto the pinnae, which is unusual. 



SABELLA HUMILIS sp. nov. 

 pi. xxvn, fig. 2; pi. xxxvi, figs. 4-11. 



Type locality. Popof Island. 



Compared with the smallest specimen of S. elegans, which has 

 about 50 segments (7 on the thorax) in a length of 15 mm. and a 

 breadth of about 2.5 mm., this species is shorter, having 55 segments 

 (8 on the thorax) in a length of 1 1 mm. and breadth of 2 mm. 



The branchiae, though of similar form, length, and number (12 

 pairs), have the basal membrane more developed and but three series of 

 unequal-sized spots of color, on most of which a pair of eyes is situ- 

 ated, while the former has six series of color spots of about equal size, 

 and regular in arrangement. There is also a noticeable contrast be- 

 tween the prevailing colors deep crimson in the present species, and 

 pale yellowish white in S. etegans. 



The tube is thin, horn-color, with a coating of very fine grey sand. 



Popof Island, July 8, one specimen, dredged. 



SABELLA LEPTALEA sp. nov. 



Pl. xxvii, fig. 6a; pi. xxxm, figs. 5, 14, 27, 99; pi. xxxiv, figs. 6-9, 22. 

 Type locality. Kadiak. 



In form and coloring this species closely resembles S.formosa and 

 S. eleganS) but differs in having the pinna of the branchiae fewer, 

 shorter, and exceedingly delicate. 



