Gatty Marine Laboratory, St. Andrews. 155 
the setigerous region from the pad formed by the ventral 
cirrus. Three strong spines with acute tips support the 
setigerous region. Dorsally is a group of simple bristles 
with a few brush-shaped forms, while ventrally are two 
strong hooks which have a stout shaft, and a large main 
fang with a process above it similar to that in the previous 
species. 
The chief changes in the posterior feet are the diminution 
of both branchia and cirrus, the elongation and slenderness 
of the dorsal bristles, the increased strength of one spine, the 
point of which projects beyond the surface, and the occur- 
rence of only a single powerful bifid hook. 
It is noteworthy that the branchiz do not attain great 
bulk in any part of the body, even the longest being rather 
slender, but their number probably compensates for their 
size. 
This species constructs a tube of its tough secretion and 
envelops it with soft, greyish, and probably sticky mud. 
The Northia iridescens, H. P. Johnson *, dredged by Prof. 
Herdman at Victoria, B.C., so far as the description and 
figures go, is not distinguishable from this species. 
The foregoing differs from the French examples of Onuphis 
Grubei by the absence of six or eight eyes behind the ten- 
tacles, by the fact that the branchiz commence on the Ist 
foot, whereas in O. Grudez of the French coast they begin on 
the 4th segment. ‘The alteration of the ventral cirrus in the 
Canadian form appears to be similar to that of the French, 
for the 7th foot has a truncated cirrus which soon becomes a 
rounded boss. The Canadian further differs in the number 
of teeth on the azygos plate and in other parts of the appa- 
ratus. DeSt. Joseph states that the bidentate strong hooks 
begin on the tenth segment. The relationship of this form 
with Marenzeller’s Onuphis holobranchia is still undecided, 
as no opportunity of comparing the specimens has yet been 
available. It would appear to be closely allied, though having 
longer tentacles and apparently shorter branchiz. 
Eunice ? 
Dredged at Station No. 11, 1872, 30 miles N.E. of Cape 
Rosier, and at a depth of 200 fathoms. 
A species of considerable size, but only a fragment of the 
anterior region, comprising about thirty bristled segments 
with the head, has been received. 
* Proceed. Boston Nat. Hist. Soc, vol, xxix, no. 18, p. 408, pl. viii. 
figs, 86, 87, pl. ix. figs. 88-92. 
