10 BRITISH COPEPODA. 



well as their spines, fringed on the outer margins with 

 closely-set, stout, spine-like setse. Basal joint of the 

 fifth pair of feet (fig. 9) produced internally into a 

 narrow quadrate lamina which bears two stout, apical 

 spines of moderate length and a series of about eight 

 spine-like setae on the inner margin ; the outer margin 

 of the basal portion forms a slender process which 

 is tipped with a plumose filament ; second joint 

 broader and shorter, tripartite at the apex, each lobe 

 giving origin to a single seta, the innermost of which 

 is the shortest. Caudal setae of moderate length. 

 Length of animal - 2 ^th of an inch (1'3 mm.). 



I was at one time disposed to consider this very 

 well characterized species as identical either with 

 Boeck's E. melaniceps or E. curticornis, though differ- 

 ing from the former in several important points, espe- 

 cially in the absence of any black markings on the 

 head and in the configuration of the fifth feet ; in this 

 last respect it also seems to differ from E. curticornis, 

 so that on the whole it seems best to assign to it a 

 new specific name, spinipes. It is very generally dis- 

 tributed round the British Islands in water of mode- 

 rate depth from low-water mark to forty fathoms, 

 and has been observed in the following places : at 

 various points off the Durham and Yorkshire coasts in 

 company with Longipedia coronata, but not so abun- 

 dant ; in tide-pools, Aranmore, Ireland; Lough Swilly, 

 two fathoms ; Scilly Islands, ten to forty fathoms ; 

 Douglas (Isle of Man), two to three fathoms ; Little 

 Cumbrae (Clyde), on weeds at ebb tide ; on weeds at 

 Tobermory (Rev. A. M. Norman). 



