650 



Farajassa 



Fig. 111. P. pelagica, (J. 

 Lateral view. [After G. 0. Sars.] 



penultimate, as long as flagellum, which is similar to that of anteriDa 1, 

 but larger. Gnathopod 1, h^^ Joint triangulär, 6*^ oval, widest in the raiddle 

 where the hind margin joins the straight oblique palm, defined by an obtuse 

 angle and palmar spines. Gnathopod 2 nearly alike in d and Q ; 6*^ Joint 



broad, in 9 the 



internal edge 



having a lunar 



notch (Leach), 



the finger closing 



within the well 



marked defining 



angle, while in 



the d this angle 



is produced iuto 



analmostthumb- 



like tooth, over- 



iapped by the 



strong finger. 



Peraeopods 1 and 2 short and stout, 2*^ Joint a little widened. Peraeo- 

 pods 3 — 5 slightly encreasing successively in leng-th; 2^ Joint oblong oval; 

 in peraeopod 5 the lower hind corner slightly produced. üropod 3 reaching 

 rather beyond the others, outer ramus unciuate, without marginal serrations, 

 inner with a lateral spinule. Telson about as long as broad, with small 

 projection and adjacent setule at each side of the apical tiiangle. Colour 

 grey or dark, with transverse bars of brown. L. g 7, d 9 mm. 



Ärctic Ocean and North- Atlantic (Norway up to Finmark, Shetland Islands); 

 Kattegat; German Sea; Liverpool Bay. 



2. P. tristanensis (Stebb.) 1888 Podoceriis t., T. Stebbing in: E,ep. Voy. 

 Challenger, v.2% p. IUI t. 121 j 1893 Ischyrocerus t, A. Della Valle in: F. Fl. Neapel, 

 ».20 p.450 t. 57 f. 20 | 1899 Farajassa t, T. Stebbing in : Ann. nat. Hist., ser. 7 ?;. 3 p. 240. 



Body not robust. Head, lateral lobes not very prominent, with acute 

 point. Side-plates 1 — 5 about equal in depth. Pleon segment 3, postero- 

 lateral corners obtuse. Eyes rounded oval, dark in spirit. Antennae 1 and 2 

 subequal, slender, with long setae, not densely grouped, some plumose. 

 Antenna 1, 3"^ Joint much longer than 1^*, subequal to 2"^, shorter than 

 flagellum, of which the 1^* Joint is about half as long as the other 3 combined; 

 accessory flagellum seemingly absent. Antenna 2, ultimate Joint of peduncle 

 as long as penultimate, both together rather longer than the 4-jointed 

 flagellum. Gnathopod 1, 2^ Joint not longer than 5*^, which is nearly or 

 quite as long as the rather narrowly oblong oval 6*^; palm ill- defined, shorter 

 than the hind margin; finger overlapping palm, finely pectinate, with a denticle 

 near the acute apex. Gnathopod 2 in d, 2*^ Joint short. with gi'eatly expanded 

 distal lobe, 5*^ short, broadly cup-shaped, 6*'^ large, not twice as long as 

 broad; palm with broad tooth near finger -hinge, then shallowly excavate, 

 parallel to front margin, and subequal to hind margin, which ends in a 

 Short tooth, against which the apex of the stout, much curved, smooth finger 

 impinges. Gnathopod 2 in q differing from gnathopod 1 by the short, cup- 

 shaped 5*^ Joint, the 6*^ somewhat larger with a better defined palm, and 

 the pectinate finger armed with a longer denticle. Peraeopods 1 and 2 

 rather short and compact, the 2'^ and 4*^ joints a little expanded. Peraeo- 

 pod 5 rather long; 2^ Joint oblong, not much expanded, shorter than the 6*^ 



