BELONGING TO THE GENERA BEADTA AND ECTINOSOMA. 425 



shnUis, nor so stout as that of Bradya typica ; rostrum rather more prominent than in 

 these two species. 



Antennules short, stout, 6-jointecl, the first five gradually decrease in length, while 

 the last is about equal in length to the third; the annexed formula shows approximately 

 the proportional lengths of the joints :■ — 



No. of the joints : 1.2.3.4.5.6 



Proportional lengths : 7 6 5 4 3 5 



Secondary branches of antennte small, slender, 2-jointed, the first joint much 

 ■shorter than the second ; a number of setse fringe the distal half of the u])per margin of 

 the first joint of the primary branches (PL 35. fig. IS). 



Labium bluntly rounded (PL 35. fig. 20). 



The anterior and 2)osterior foot-jaws are somewhat similar in structure to those of 

 Bradya elegaiis, but smaller (PL 35. figs. 30 and 37). 



The first four pairs of swimming-feet are somewhat similar to those of Bradya typical 

 Boeck, but slender (PL 35. figs. 43 and 15). 



The inner produced part of the basal joint of the fifth pair is elongate, narrow, cylin- 

 drical, ciliate on the inner margin, and provided with two apical setre, one of which is 

 rather longer than the basal joint, while the other is scarcely half as long ; the outer 

 angle of the basal joint is considerably produced and bears a small slender terminal 

 seta ; a moderately stout plumose seta springs from the lateral aspect of the basal joint 

 and near the base of the secondary joint ; the secondary joint, which is al)Out one and 

 a half times longer than l)road, extends somewhat beyond the end of the produced 

 inner part of the basal joint, and has a somewhat irregularly trilol)ed apex ; the two 

 inner lobes are subequal and extend beyond the outer one ; the three lobes are each 

 provided with a plumose seta ; the inner seta is short and stout, the middle one long 

 and slender, and nearly twice the length of the outer. Both basal and secondary joints 

 are furnished with transverse rows of cilia on their lateral aspect, as shown by the 

 figure (PI. 36. fig. 6). 



Caudal stylets about one and a half times the length of the last abdominal segment; 

 colour brown (PL 36. fig. 8). 



EaUtat. Largo Bay, Pirth of Forth (1891). 



Remarks. The structxire of the antennules and antennae and of the fifth pair of 

 thoracic feet are characters by which the species is readily distinguished ; no similar 

 structure has been observed in any of the other species examined by us. 



Bradya minor, sp. n. (PL 35. figs. 5, 9, 13, 21, 24, 31, 35, 42 ; PL 36. figs. 5 and 9.) 

 Description. Length '54 mm. (^e of an mch). Body moderately stout ; the abdomen 

 is more distinctly separated from the thorax in this species than in any of the others 

 described in this memoir ; rostrum somewhat slender and prominent. 



Antennules short, stout, and 6-jointed ; a dusky-coloured pigment-spot occurs on 

 the first joint, as shown in the figure (PL 35. fig. 9), but Avhether it functions as an eye 



