299 



gnathopoda of moderate size, propodos oblong oval in form, more than twice as 

 long as it is broad, palm scarcely longer than the hind margin, carpal lobe not 

 extending to the palm of the propodos. Posterior gnathopoda comparatively 

 strong, propodos about 3 times as long as it is broad, carpal process not fully 

 extending to the palm of the propodos. The 2 anterior pairs of pereiopoda 

 rather stout, basal joint strongly curved and considerably dilated distally, 

 carpal joint short and broad, nearly heart-shaped, forming inferiorly a rounded, 

 densely setous expansion, propodal joint considerably longer and somewhat 

 curved, dactylus not attaining the length of the latter. The 2 succeeding pairs 

 nearly as in M. tessellatus. Last pair very elongated, considerably exceeding- 

 half the length of the body, basal joint obpyriform in outline, carpal joint 

 about the length of the propodal one, and longer than themeral joint. Telson 

 rounded quadrangular, terminal edge slightly insinuated. Body yellowish 

 white, variegated, on the dorsal face, with a dark brownish pigment, forming 

 broad bands across the segments, and a distinct reticulation on the sides of 

 the cephalon. Length of adult female 10 mm. 



Remarks. - - This species was established by Boeck to include one of the 

 2 forms erroneously referred by Goes to M. ctffinis of Bruzelius, and repre- 

 sented in fig. 21 1 by the latter author. It is easily recognized from any of 

 the other species by the abruptly geniculated frontal part. 



Occurrence. The species is rather commonly met with off the whole 

 coast of Finmark, as also off the Lofoten Isles. It extends southwards at 

 least to the Trondhjemsfjord, where I have collected it in some places in 

 great abundance. 



Distribution. Arctic Ocean: Spitsbergen (Goes), Greenland (Hansen), 

 the Siberian Polar Sea (Stuxberg); British Isles (Robertson). 



8. Monoculodes pallidus, G. 0. Sars, n. sp. 



(PI. 106, fig. 3). 



Body somewhat compressed, and having the segments sharply defined, 

 though not exhibiting any distinct dorsal keel. Cephalon not attaining the 

 length of the 3 anterior segments of mesosome combined, frontal part not much 

 produced, and continued to a very narrow and acute, evenly-curved rostrum, 

 which however does not extend to the end of the basal joint of the superior 

 antennae; lateral corners of cephalon obtuse. First pair of coxal plates but very 

 little expanded distally, and scarcely broader than the succeeding pair; 4th 

 pair about as deep as the corresponding segment, distal edge evenly curved, 

 infero-posteal corners rather produced. Eyes comparatively small, rounded, 



