62 Annelida Chcetopoda 
surface, nine or ten posterior segments dark brown to black. 
Eighteen anterior segments, with capillary sctse ; 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 setse stand, running 
down the sides, becoming wider and rounded in front. 
The spinulae 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 littoraUs Noroegice, pi. ii, figs. 6, 7), except that 
they^have an additional tooth. The spinulse are also very 
much alike (compare f. 147 with Sars 1. c. pi. ii, f. 5). 
Malragren has figured the same parts [Nord. Hafs-Ann., 
pi. XX, figs. 50 D, 50 C), but his figures difier so much from 
those given by Sars that it hardly seems probable they 
were made from the same species. 
Fam. TEREBELLID^. 
AMPHITRITE {MilUer) Mgrn. 
Amphitrite ornata Verrill. 
Terebella ornata Leidy. Marine Invert. Fauna. R. I. and N. J., p. 14, pi. 
xi, figs. 44, 45. 
Amphitrite ornata Vekk. Invert. An. Vin. Sound, etc., p. 613, pl.ivi, f. 82. 
Very common in mud and sandy mud, at low water. 
SCIONOPSIS Verrill. 
ScioNOPSis PALMATA Vcrr. 
Invert. Animals of Vineyard Sound, etc., p. 614. 
