AOONTIOPHOEUS. 71 



than broad, and furnished with five long, subequal, 

 terminal setge. Caudal segments about thrice as long 

 as broad, and nearly equal in length to the last two 

 abdominal somites ; terminal set93 five, finely plumose, 

 three short and two of moderate length, the longest 

 being more than equal to the length of the abdomen. 

 Length Yeth of an inch ('98 mm.). 



This, though nowhere an abundant species, is gene- 

 rally distributed round the British Islands ; the follow- 

 ing are the localities in which it has been observed. 

 Taken in the surface-net at night in Round stone 

 and Westport Bays, and on Laminaria saccharina in 

 Olifden Bay, Ireland; dredged off Portincross, Ayr- 

 shire, and in forty fathoms off" St. Agnes (Scilly 

 Islands) ; in thirty to thirty-five fathoms ofi Robin 

 Hood's Bay, Staiths, and Red Cliff (Yorkshire) ; and 

 in twenty-seven fathoms off" Hawthorn (Durham). 



2. AcoNTioPHOEUS AEMATUS, nov. sp. PI. LXXXYII, 



figs. 8—15. 



Ascomyzon ornatum, Brady and Robertson. Brit. Assoc. Report, 

 p. 197 (1875). 



Anterior antenna (fig. 8) 6- jointed, very slender, 

 densely clothed with fine setae, some of which are 

 plumose; the relative lengths of the joints are as 

 follows : 



1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16. 

 7 2 7 3 i i 3 2 2 2 2 4 4 U 3 3~ 



