AMrHIPODA ANU ISOrODA 01' THE IIRTU OF CLYDK. 207 



Genus Phoxocephalus, Stebbing. 



PHOXOCEPIIALUS FULTONI, T. Scott. 



Phoxocephalus fultoni, T. Scott, Eighth Annual 

 Report, Fishery Board for Scotland, pt. 3 (1890), 

 p. 327 ; pi. xii. figs. 10-12, and pi. xiii. 



The lower hinder angle of the third pleon-segment 

 rounded. 



Etjes oval, black, retaining the colour in spirit. 



Upper Antennas, Principal flagellum consisting of 

 five slender joints, the last one tipped with a very 

 long seta ; the secondary flagellum three-jointed. 



Lower Antennas. In the male the third and fourth 

 joints of the peduncle are hirsute above ; the flagel- 

 lum consisting of twenty-three slender joints, with 

 a calceolus on each of the first three joints, and 

 then on every alternate joint. 



Mandibles. Secondary plate of left mandible having 

 six teeth ; the third joint of the palp having one 

 setiform spine on the side and eight such spines on 

 the apex. 



First Maxillce. The one-jointed palp tipped with 

 three setae. 



First Gnathojwds. Side-plates widened below, carry- 

 ing three or four setules. The wrist narrow, tri- 

 angular, its front margin nearly' as long as that of 

 the hand ; the hand much longer than broad, the 

 upper hinder angle rounded, the hind margin for 

 some distance pnrallel to the front, then slightly 

 diverging and ending in a pronounced tooth so much 

 in advance of the front margin that the smooth 

 convex palm, instead of as commonly sloping up, in 

 this case slopes down from the hinge of the finger 

 to the apical tooth of the hind margin. The finger 

 curves round the palm, fitting into the cavity of the 

 tooth just mentioned, which carries a small spine 

 on its inner side. The various joints have only one 

 or two setae apiece. The palm is bordered with 

 setules. 



Second Gnath.oj)ods. These have a general simi- 



