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 setae 

 three long and three short; on the outer also six 

 setae, three of which are much more slender than the 

 rest ; inner margin ciliated. Caudal segments 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, Glaus, 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 

 Laminariae in Shetland, and two or three washed off 

 weeds dragged up near the " Allans," Cumbrae (Firth 

 of Clyde). 



