132 BRITISH COPEPODA. 
spine, that of the second joint beset with a series of © 
six short spines, and one large spine at the apex; last 
joint fringed with six spines which increase in length 
from the first to the last, the last being very long and 
plumose. Fifth pair large, both joints nearly equal, 
the inner large and sub-triangular, the outer broadly 
ovate (fig. 8), both joints bordered by wide chitinous 
plates; on the inner joint six spine-like apical setze 
—three long and three short; on the outer also six 
sete, three of which are much more slender than the 
rest; inner margin ciliated. Caudal seements broader 
than long, fringed with numerous short, spine-like 
cilia ; inner tail-seta dilated at the base, much shorter 
than the abdomen ; outer about half as long. | 
I have some doubt whether the species here de- 
scribed is rightly referred to rufo-violascens, Claus, but 
if not so it must be very closely allied to that Species. 
The most conspicuous characters are the very strongly 
arched and clawed foot-jaw, the peculiar form of the 
joints of the outer branches of the swimming-feet, — 
the large chitin-bordered fifth foot, and the general 
outline of the whole animal. This seems to be a very 
rare species in Britain. I have seen only very few 
examples,—two from Mr. Norman’s washings of 
Laminariz in Shetland, and two or three washed off 
weeds dragged up near the ‘‘ Allans,’” Cumbrae (Firth 
of Clyde). 
