289 Canon A. M. Norman and Dr. T. Scott on 



first pair of natatory legs the proximal joint of the inner 

 branches is about equal to the entire length of the outer, but 

 the second joint is only about half the length of the third, 

 while the second and third joints are together about equal 

 to two thirds the length of the proximal joint; the joints of 

 the outer branches are subequal. The next three pairs are 

 similar to those in Stenhelia reflexa. 



The fifth pair has the inner portion of the primary joint 

 produced into a narrow subtriangular plate, the bluntly 

 rounded apex of which reaches to about the middle of the 

 secondary joint ; there are three setse on the inner margin, 

 the upper two are short and subequal, the lower moderately 

 elongated ; there are also two slender and moderately long 

 apical setse of unequal length. The secondary joint is mode- 

 rately narrow and elongated, the breadth being scarcely half 

 the length; it is broadest near the proximal end and tapers 

 gradually to the truncate and somewhat angular apex ; a 

 small seta springs from near the distal end of the inner 

 margin, two of moderate length from the truncate apex, and 

 three small ones from the lower half of the outer margin ; 

 that one of these three which, is nearest the distal end is the 

 smallest and is provided with a, peculiarly thickened base. 



No males of this species have been observed. The peculiar 

 form and armature of the fifth pair of thoracic feet appear to 

 be characteristic of the species. 



The furcal joints in this species are short. 



Genus Parastenhelia, I. C. Thompson & A. Scott, 1903. 



Parastenlielia anglica, sp. n. 



The genus Parastenhelia was instituted by I. C. Thompson 

 and Andrew Scott for two species which, though having a 

 close resemblance to Stenhelia, differ in possessing nine- 

 jointed antennules, in the middle joint of the outer ramus of 

 the antennas being nearly as long as the joint on either side, 

 and in having the inner branches of the first natatory legs 

 two-jointed, the first joint being considerably longer than the 

 three-jointed outer branches. The form I have now to 

 describe agrees so closely with the typical species that I have 

 little hesitation in ascribing it to the same genus, even 

 though the inner branches of the first pair of legs be appa- 

 rently three-jointed. In this form the antennules are composed 

 of nine joints ; the first four are together equal to fully twice 

 the entire length of the other five, the second is considerably 



