262 



surface, nine or ten posterior segments dark brown to black. 

 Eighteen anterior segments, with capillary setae ; posterior 

 segments, 55. There is a narrow raised ventral band be- 

 tween the bases of the opposite feet on the first 17 seti- 

 gerous segments. The first three setigerous segments have 

 a narrow white band on which the setae stand, running 

 down the sides, becoming wider and rounded in front. 



The spinulse are slightly convex, strongly striated trans- 

 versely ; longitudinal striae interrupted by the transverse ; 

 of uniform width to near the end, when they curve sud- 

 denly, ending in a sharp point (f. 147). 



Capillary setae bilimbate; one margin very narrow and 

 shorter than the other (f. 146). Uncini with four long 

 sharp teeth, and one short tooth (f. 145). 



This species is certainly closely related to Sabellides 

 [Melinna Mgrn.) cristata Sars, but probably not the same. 

 It will be seen that the uncini agree with those figured by 

 Sars {Fauna littoralis Norvegice, pi. ii, figs. 6, 7), except that 

 they have an additional tooth. The spinulae are also very 

 much alike (compare f. 147 with Sars 1. c. pi. ii, f. 5). 



Malmgren has figured the same parts [Nord. Hafs-Ann,, 

 pi. XX, figs. 50 D, 50 C), but his figures differ so much from 

 those given by Sars that it hardly seems probable they 

 were made from the same species. 



Fam. TEREBELLID^. 



AMPHITRITE {Muller) Mgrn. 



Amphitrite ornata VerrilL 

 Terebella ornata Leidy. Marine Invert. Fauna. R. I. and N. J., p. 14, pi. 

 xi, figs. 44, 45. 



Amphitrite ornata Verr. Invert. An. Vin. Sound, etc., p. 613, pi. xvi, f. 83. 



Very common in mud and sandy mud, at low water. 

 SCIONOPSIS VerrilL 

 SCIONOPSIS PALMATA VeVV. 

 Invert. Animals of Vineyard Sound, etc., p. 614. 



