150 COPEPODA. 



feet being apparently three-jointed instead of consisting of 

 only two joints ; but with this exception the present form 

 agrees so closely with the two species already described by 

 that author that we have no hesitation in ascribing it to the 

 same genus. No males of the species just described have been 

 observed, and only one or two females were noticed. 



/ 



AMEIRA SIMPLEX, Norman & T. Scoit. (Pis. X. figs. 7-9; 

 XII. fig. 4 ; XIII. fig. 3 ; XIV. fig. 5 ; XVII. fig. 3 ; 

 XXI. fig. 7.) 



1905. Amcira simplex, Norman & Scott, Ann. & Mug. Nat. Hist. 

 ser. 7, vol. xv. p. 291. 



Description of the female. Length of the specimen repre- 

 sented by the drawing (PI. XIII. fig. 3) '04 mm. (^ of an 

 inch). Body somewhat slender, with the forehead produced 

 into a moderately prominent rostrum. 



Antennules short, not very stout, and composed of eight 

 joints ; the first two joints are longer and rather more robust 

 than the others, the next four are short and subequal, the 

 terminal joint is small but is rather longer than the penultimate 

 one. The formula indicates approximately the proportional 

 lengths of the various joints (PI. XII. fig. 4) : 



Proportional lengths of the joints . . 15.15.9.8.6.7.3.5 

 Numbers of the joints 1 2 345678 



Antennae small; secondary joint short and uniaiticulate, 

 and provided with a few terminal setae (PL X. fig. 7). 



Mandible small; the mandible-palp simple and one-branched 

 (PI. X. fig. 8). The second maxilliped is represented by 

 PL X. fig. 9. 



The first pair of thoracic legs have elongated and slender 

 inner branches; the second joint of the inner branch is about 

 half as long as the first, but the first and third are nearly of 

 equal length, the third being rather the smaller of tho two. 

 The outer branch, which consists of three subequal joints, 

 reaches scarcely to the end of the second joint of the inner 

 branch. 



The next three pairs are also moderately slender, but have 

 the outer branches rather longer than the inner. Figure 5, 

 Plate XIV., represents the fourth pair. 



The fifth pair are small ; the produced inner portion of 

 the primary joint is subcylindrical, the apex of which is 

 obliquely truncate and furnished with five setse, the second 

 one from the outside much longer than the others. The 

 secondary joint is subovate, its length being equal to about 

 twice the width at the proximal end ; the sides, \\ Inch 



