422 MESSES. T. A]\'D A. SCOTT — EEVISION OF THE BRITISH COPEPODA 



KabHat. Off Port Cressa Bay, Scilly Islands ; and off Hartlepool {G. S. Brady). West 

 of May Island, Firth of Fortli. Port Erin, Isle of Man (7. C. T.). 



Bemcu'ks. The Firth of Forth specimens differ in one or two minor points from 

 Dr. Brad3''s description and figures in his excellent Monograph of the British Copepoda, 

 i. e. the antennules in the Forth specimens are 8-jointed and the secondary branches 

 of the antennae are 3-jointed (in this latter particular they agree with Boeck's 

 description), but in all the more important characters they agree with the description 

 and figures contained in Dr. Brady's valuable Avork. 



Bradya elbgans, sp. n. (PI. 35. figs, i, 10, 15, 25, 29, 36, 38, 46 ; PL 36. figs. 4 and 11.) 

 Description. Length 1-2 mm. (-/r of an inch). Body elongate, slender ; rostrum 



prominent, seen from above broadly rounded. 



Antennules very short, stout, 5-jointed, strongly setiform, the second and last joints 



shorter than the others ; the approximate proportional lengths of the joints are shown by 



the formula : — 



No. of the joints : 1.2.3.4.5 

 Proportional lengths : 7 3 5 5 3 



AntennsB stout ; secondary bi'anch shorter than the primary, 2-jointed, the first joint 

 very short, the second elongate and becoming gradually dilated towards the distal end, 

 provided with two elongate, somewhat unequal, and densely plumose apical setoe ; the 

 last joint of the primary branch bears a number of setae that are coarsely and somewhat 

 irregularly plumose (PI. 35. fig. 15). 



Mandibles somewhat stylet-shaped ; both branches of the palp, which are subterminal 

 on the basal joint, are strongly setiferous (PL 35. fig. 25). 



Anterior foot-jaws small; basal joint stout, the three setiferous marginal processes 

 nearly alike; second joint much narrower and somewhat dilated distally ; the last three 

 joints are very small (PL 35. fig. 29). 



Posterior foot-jaws somewhat similar in structure to those of Ectmosoma Sarsi, Boeck, 

 but smaller (PL 35. fig. 36). 



The first four pairs of swimming-feet are proportionally more slender and elongate than 

 those of Brachja typica, Boeck (PL 35. figs. 38 and 46). 



The fifth pair are moderately large and broadly subquadrangular ; the produced inner 

 portion of the basal joint is cylindrical and twice as long as broad, and armed at the 

 apex with a moderately long spiniform seta, and a stout spine about half the length of 

 the seta; the outer angle of the basal joint, which is not produced, is provided with a 

 single slender hair and a few small spines ; the inner margin is fringed with small setae, 

 and there is an oblique row of similar setae on the lateral aspect of the joint ; the 

 secondary joint is broad and nearly square in outline ; the truncate aj)ex, which does not 

 extend beyond the end of the produced inner portion of the basal joint, is irregularly 

 serrate and bears three elongate sjiiniform setae arranged widely apart ; the middle one is 

 considerably longer than the one on either side ; there is also a slender seta on the outer 

 angle, and an oblique row of minute spines near the inner margin (PL 36. fig. 4). 



