BELONGING TO THE GENERA BRADYA AND ECTINOSOMA. 423 



Habitat. Lar<?o Bav. Pirth of Fortli. 



BemarJcs. This is a slender and very graceful species ; the broadly subiiuadrate form of 

 the fifth pair of feet is very characteristic. The antennae and mandibles differ some- 

 what from those of the typical Bradya, but otherwise it appears to be a true member of 

 the genus. 



Bradya hirsuta. sp. n. (PL 35. figs. 2, S, 17, 10, 23, 28, 34, 40, 47; PL 36. 

 figs. 2-7.) 



Description. Length 1 mm. (^5- of an inch). Body seen from the side fusiform ; 

 abdominal segments more or less hirsute ; rostrum prominent. 



Antennules short, 5-jointed, the first two joints robust, the others smaller; the pro- 

 portional lengths of tlie joints are nearly as sliown by the formula : — 



No. of the joints : 1.2.3.4.5 



Proportional lengths : 7 8 3 4 4 



Antennoe considerably more elongate than the antennvdes, the last joint armed with a 

 number of spiniform setse, the distal half of each of which is strongly ciliate along one 

 side; secondary branches 2-jointed, slender, the first joint short, the second elongate 

 and bearing two terminal setae. 



The labium consists of a small hook-like process (PL 35. fig. 19). 



Mandibles comparatively small and narrow, and armed with a few slender teeth ; 

 mandibular ]7alp larger, the basal joint furnished with a single short subapical plumose 

 •seta in addition to the secondary branches (PL 35. fig. 23). 



Anterior foot-jaws small ; the first joint is very dilated, the second much narrower, 

 while the thi'ee terminal joints are very small (PL 35. fig. 28). 



The first joint of the posterior foot-jaws bears a long setiferous spine on the upper 

 distal angle, one of the margins of which is fringed with cilia; the last joint, which is 

 very short, bears two moderately stout spiniform seta3 and a long intermediate hair 

 (PL 35. fig. 34). 



The first four pairs of swimming-feet have the marginal spines and terminal spiniform 

 seta strongly plumose on the exterior edges (PL 35. figs. 40 and 47). 



The fifth pair are strongly setiferous ; the produced inner portion of the basal joint 

 bears one long and one short spiniform seta ; the secondaiy joint extends beyond the end 

 of the produced inner portion of the basal joint, and is armed with three terminal spines ; 

 the two outer ones are elongate and slender, while the inner one is strong and robust, and 

 only about half the length of the one next to it ; a plumose seta springs from the lateral 

 aspect of the basal joint, near the exterior edge, and both joints bear transverse rows of 

 cilia, as well as being otherwise hirsute, as shown by the figure (PL 36. fig. 2). 



Caudal stylets stout, elongate, and considerably divergent, their margins ciliate on the 

 .distal half (PL 36. fig. 7j. 



Habitat. Largo Bay, Firth of Forth (1891). 



Remarks. This species is at once distinguished by its comparatively large size and long 

 divergent caudal stylets, as well as by its hirsute abdomen and fifth pair of thoracic feet. 



