16 BRITISH OOPEPODA. 



the marginal spines of the outer branch are strongly 

 pectinate (fig. 9) towards the apices, and the longer 

 setae are plumose. The basal joint of fifth pair of feet 

 (fig. 11) is short and broad, and bears three long 

 plumose setae, the second joint is quadrangular, small, 

 and has three apical setae, one much longer than the 

 other two ; in the male (fig. 12) the segments of the 

 fifth foot are even less developed, but bear an almost 

 exactly similar set of setae. The abdominal segments 

 are produced downwards at the angles into short spines. 

 The caudal segments are short, about twice as long as 

 broad, having two short spines on the outer margin 

 and two at the apex, the longest of which is about 

 equal in length to three rings of the abdomen ; while 

 the smaller is barely half as long as the other. Length, 

 - 2 \th of an inch ('9 mm.). 



Several specimens of this curious and distinctly 

 characterized species were dredged twenty miles off 

 Sunderland, on a bottom of muddy sand in forty- five 

 fathoms water ; also five miles off Hartlepool on a 

 sandy bottom. M. Boeck's specimens were taken 

 amongst mud in Christiania fiord in a depth of sixteen 

 fathoms. 



Genus 4. BBADYA, Boeck (1872). 



Anterior antennae very short, 7-jointed ; inner 

 branch of the posterior antennae of moderate size, 

 2-jointed (" 3-jointed," Boeck). Mandible-palp large, 

 2-branched. Maxillar palp well developed. First 



