573 



flagellum about the length of the last 2 peduncular joints combined, and 

 likewise composed of 5 articulations. Gi-nathopoda in female not very strong, 

 tliP anterior ones with the carpus rather elongated, and but slightlj' expanded 

 lielow, propodos about same length, aiul oblong oval in form, with the palm 

 imperfectly defined below. Posterior gnathopoda, as usual, somewhat stronger 

 than the anterior, with the carpus rather short, and produced below to a 

 narrow setiferous lobe, propodos oval triangular in form, with the palm rather 

 oblique, and defined below by an obtiise angle. Both pairs of gnathopoda in 

 ]nale, but especially the posterior ones, much stronger than in female, propodos 

 of the anterior ones having the palm deeply excavated in the middle, and 

 defined below by a projecting angle, that of the posterior ones extremely 

 large, being greatlj'^ expanded in its proximal part, and rapidly tapering 

 distally, palm much longer than tlie hind margin, and defined below by a 

 strongly projecting triangular lol^e, its edge minutely crenulated and bisinuate, 

 with 2 angular projections, dact3dus rather strong and, when closed, impinging 

 within the posterior sinus of the palm. Pereiopoda rather slender, and some- 

 what resembling those in P. longicaudata: last pair, however, less elongated, 

 not nearly extending to the end of the body. Last pair of uropoda nearly the 

 same as in that species. Telson extremely .small, being nearly twice as broad 

 as it is long, and having, as usual, on either .side at the tip a small nodiform 

 projection. Bodj- whitish grey, with a very slight trace of a somewhat 

 darker pigment on the coxal plates. Length of adult female scarcely' attain- 

 ing 4 mm, of male about the same. 



EemarJcs. — The present species is easily distinguishable from both 

 the preceding ones by the short and stout body, the comparatively very 

 large coxal plates, the very thin and sparsely setous antennae, and Ijy the 

 structure of the gnathopoda, especially those in the male. It is also mucli 

 inferior in size. 



Occurrence. I first detected this form in the Varangerfjord, where 



it occurred rather abundantly in a depth of 30 — 40 fathoms. Subsequently 

 I have also met with it in a few other places on the Finmark coast, and 

 southwards to Bronosund on the Nordland coast. 



Disirihution. — Greenland (Hansen), British Isles (Mealier). 



7G — Crustacea. 



