424 MESSES. T. AND A. SCOTT — EEYISION OF THE BRITISH COPEPODA 



Bradta similis, sp. n. (PI. 35. figs. 3, 7, 16, 27, 33, 41, 48 ; PI. 36. figs. 3 and 10.) 

 Description. Length "69 mm. (a\- of an inch). Body seen from the side slender, fusi- 

 form ; rostrum of moderate length and slightly curved. 



Antennules short, robust, 5-jointed; the first four joints about equal in length, but 

 the terminal joint rather shorter than the others. The proportional lengths of the joints 

 are nearly as shown by the formula : — 



No. of the joints : 1.2.3.4.5 



Proportional lengths : 8 8 8 8 5 ' 



Antennae longer than the antennules ; the first joint is about one and a half times the 

 length of the next and bears a small 2-jointed secondary branch at the distal end ; the 

 second and third joints are aboiit equal in length (PI. 35. fig. 16). 



Mandibles nearly as in Bradya hirsufa. 



Anterior foot-jaws much smaller than those of Bradya hlrsuta, and with three small 

 marginal pi'ocesses on the first joint (PI. 35. fig. 27). 



Posterior foot-jaws also smaller and j)rovided with simple setiB (PL 35. fig. 33). 



The first four pairs of swimming-feet are all somewhat similar, except that the first 

 pair are rather more slender than the others ; the marginal spines of all the four pairs 

 are elongate and slightly setose on both edges ; the seta on the exterior angle of the 

 second basal joint of the fii'st pair is elongate and slender, while the seta similarly 

 situated on the fourth pair is considerably shorter (PI. 35. figs. 41 and 48). 



In the fifth pair the exterior and interior produced 2)ortions of the basal joint are 

 somewhat similar, except that the inner is rather longer than the outer process and is 

 armed with a long stout spine, setose on botli margins, and a stout seta, while the outer 

 process bears a single moderately long seta ; the basal joint is furnished with one short 

 and one moderately long setose spine and a few small setcC on the lateral aspect, as 

 shown in the figure (PL 36. fig. 3) ; the secondary joint reaches beyond the end of the 

 basal joint and terminates in three more or less distinct lobes ; the two inner ones, which 

 are subequal, extend considerably beyond the outer ; the inner and outer lobes are each 

 armed with a very stout and moderately long spine, while the spine that springs from 

 the middle lobe is slender and much more elongate than the lateral spines ; all the three 

 spines have setose margins. 



Caudal stylets comparatively elongate, being about equal to the combined lengths of 

 the last two segments of the al)domen ; they are also somewhat divergent, as shown in 

 the figure (PL 36. fig. 10). 



Habitat. Largo Bay, Pirth of Forth. 



MemarJis. This species resembles the one last described, but is much smaller. The 

 small secondary branches of the antennce and the structure of the fifth pair of thoracic 

 feet seem to be the chief distinguishing characters. 



Bead-ea fusca, sp. n. (PL 35. figs. 6, 12, 18, 20, 30, 37, 43, 45 ; PL 36. figs. 6 and 8.) 

 Description. Length "7 mm. (3-^ of an inch). Body not so slender as that oi Bradya 



