458 Part III. — Twentieth Annual Report 



Antennules scarcely reaching to the end of the cephalo-thoracic seg- 

 ment, eight-jointed ; the first four joints are large, but the last four are 

 very small (fig. 20). 



Antennae short and moderately stout ; secondary brancnes small and 

 three-jointed (fig. 21). 



Mandibles robust, with a broadly truncate biting edge which is armed 

 with several small and somewhat irregular teeth ; palp well developed, 

 two-branched, but the posterior branch is very small (fig. 22). 



Second maxillipeds stout, and armed with a moderately strong ter- 

 minal claw (fig. 23). 



First pair of thoracic feet stout ; the proximal joint of the inner 

 branches scarcely reach beyond the ends of the outer ones, second joint 

 small, the third is about twice the length of the second, while the second 

 and third together are scarcely equal to half the length of the first joint ; 

 the outer branches are composed of three sub-equal joints (fig. 24). The 

 second, third, and fourth pairs are slender and moderately elongated, and 

 the branches are all three-jointed ; figure 25, which represents the fourth 

 pair, shows that the inner branches are only slightly longer than the outer 

 ones. 



The fifth pair are foliaceous, the basal joints being broadly sub- 

 triangular, and furnished with five moderately stout but not very long 

 setae on the somewhat rounded apex. The secondary joints are sub- 

 rotund, and scarcely reach beyond the apex of the basal joints ; they are 

 each provided with five setae of unequal lengths, the second and third, 

 counting from the inside, being considerably longer than the other three 

 (fig. 26). 



The caudal furca are very short. 



Habitat. — This species was obtained in some dredged material from 

 "Station VII., Firth of Forth (between Fidra and the Bass Rock), on 

 July 9th, 1901 ; it appears to be somewhat rare. No males were 

 observed. 



Remarks. — The Stenhelia just described, and which I have referred to 

 Stenhelia hispida, G. S. Brady, while differing in a few particulars from 

 the species named, agrees very well with it in several important particu- 

 lars. The structure of the antennules, for example, is almost identical 

 with that of the antennules in Stenhelia hispida as described and figured 

 by Professor G. S. Brady, and the first and fifth pairs of feet are also 

 nearly alike in both. 



Stenhelia confusa, T. Scott (sp. n.). PI. XXII., figs. 17-25. 



Description of the Female. — Length about 9 ram. (about ^ of an 

 inch). Body moderately stout, tapering slightly towards the posterior 

 end ; rostrum prominent (fig. 17). 



Antennules shorter than the cephalo-thoracic segment, moderately 

 stout, and composed of eight joints; the first, second, and end joints are 

 the longest, while the fifth and sixth are very small (fig. 18). The 

 approximate proportional lengths of the various joints are shown in the 

 formula — 



Proportional lengthslof the joints, . 22 . 14 . 8 . 6 . 3 . 4 . 7 . 14 

 Numbers of the joints, . . . 1. 2.3.4.5.6.7. 8 



All the joints with the exception of the first are moderately setiferous. 



The antennae are somewhat similar to those of Stenhelia ima, Brady 

 (fig. 19). 



The mandibles are also somewhat similar to those of the same species, 

 but the branches of the mandible-palp appear to be shorter (fig. 20). 



