312 DR THOMAS SCOTT ON THE 



the end joint of the inner minus carries three setse on the inner margin, two at the 

 apex and a tolerable stout spine at the outer distal angle ; but in the fourth pair, the 

 same end joint is furnished with only two setse on the inner margin (see figs. 20 and 21). 



In the fifth pair, which are comparatively small, the basal joint is moderately 

 expanded interiorly and provided with five elongated and rather slender plumose setse 

 on the broadly rounded distal end ; the second joint is small, oblong in form, and 

 about twice as long as wide ; the inner margin is nearly straight, but the outer is 

 slightly rounded and fringed with minute setae ; it is also provided with six plumose 

 setje round the distal end, as shown in the drawing (fig. 22). 



Habitat. Scotia Bay, South Orkneys; collected in June 1903; Station 325, 

 60 43' 42" S., 44 38' 33" W. 



Remarks. This species has a slight resemblance to the Dactylopusia antarctica of 

 Giesbrecht, from the Belgian Antarctic Expedition, but it differs distinctly from it in 

 the structure of the antennules and of the fifth pair of thoracic legs. Named in 

 compliment to Mr James G. Ferrier, a member of Committee and Secretary to the 

 Expedition. 



Dactylopusia perplexa, new species. (PI. II. figs. 2G-30 ; PI. VI. figs. 1 and 2.) 



Female. Body moderately stout. Length, 0'8 mm. 



Antennules short, robust, and composed of nine joints, the first four of which are 

 moderately large, and the second, third, and fourth are each rather shorter than the 

 preceding one ; the next two joints and the last joint are nearly equal in size, and are 

 each fully half as long as the fourth ; the seventh and eighth are also nearly equal, but 

 they are shorter than any of the others. 



Antennse stout ; outer ramus three-jointed and of moderate length ; mandibles with 

 the distal end somewhat attenuated ; mandible-palp small and two-branched. 



The second maxillipeds are short and rather robust, and they are provided with short 

 but moderately stout terminal claws. 



The first pair of thoracic legs are short and stout, and the rami are nearly of equal 

 length ; the outer ramus, which is slightly shorter than the other, is armed with short, 

 stout terminal claws ; in the outer ramus, the middle joint is about twice as long as the 

 preceding one, but the end joint is small and is provided with tolerably stout terminal 

 claws. The next three pairs are all moderately stout, with short margin spines on the 

 outer rami. 



The fifth pair are short, and both segments are somewhat expanded ; the inner 

 portion of the basal segment, which reaches to about the middle of the second, bears 

 five setse on its broadly rounded end ; the two inner setse are short and tolerably stout ; 

 the two outer are more slender and are close together, but the middle one, which is 

 also stout, is moderately elongated. The second segment is broadly ovate, the greatest 

 width being equal to about three-fourths of the length ; this segment is furnished with 

 three short sctce on the lower half of the outer margin, one on the inner margin, and 



(BOY. SOC. EDIN. TRANS., VOL. XLVIII., 558.) 



