98 G. 0. SARS. CRUSTACEA. [norw. POL, EXP. 



comparatively small and separated by distinct interspaces, 2 of them issuing 

 from the 1st basal joint, 2 others from the 2nd, and the 5th from the 3rd basal 

 joint. The lobes carry each 2 ciliated setae of moderate length, except the 

 proximal one, which has 3 such setae. One of the setae of the 5th lobe is 

 rather strong and spiniform. A 6th lobe, carrying 3 setae, is formed by the 

 1st joint of the terminal part, the 2 other joints being provided with a number 

 of moi'e claw-like spines. 



The posterior maxillipeds (fig. 8) are rather powerful, with the 1st basal 

 joint considerably larger than the 2nd, and the terminal part very fully deve- 

 loped, consisting of 5 well-defined joints carrying claw-like, anteriorly curving 

 spines. 



The legs (figs. 9, 10, 11) are all natatory, and in structure resemble, on 

 the whole, those in the genus Augaptilus, though comparatively less power- 

 ful. The 1st pair (fig. 9) have the basal part bent in a peculiar manner, 

 so that these legs extend more laterally than the other pairs. The 1st basal 

 joint exhibits outside a very conspicuous rounded protuberance, and the 2nd 

 has, at the outer corner, a slender bristle not found in the other pairs. The 

 rami closely agree in structure with those in Augaptilus glacialis, and have 

 the very same number of spines and setae. The 3 succeeding pairs (fig. 10) 

 likewise exhibit much the same structure as in the above-mentioned form, 

 except that the apical spine of the outer ramus is comparatively smaller. 

 The last pair of legs (fig. 11) are scarcely different in structure from the next 

 preceding ones. They are, however, as usual, somewhat smaller, and the 

 terminal joint of the outer ramus has only 3 natatory setae instead of 5, and 

 2 spines outside, instead of 3. On the other hand, each of the 2 preceding 

 joints has a perfectly normal natatory seta, and the 1st basal joint also has 

 its usual plumose seta inside. The inner ramus is scarcely half as long as 

 the outer, and its 2nd joint has only a single natatory seta. 



Occurrence. The above-described specimen was found in a sample 

 taken between March 26th and April 4th, 1895, about midway along the route 

 of the 'Fram', and in about the 84th degree of latitude, the tow-net having 

 been lowered to a depth of 130 metres. 



