29 



and last segments of mesosome scarcely more than half- as long as the others. 

 Metasome slightly dilated, and scarcely longer than the last 2 segments of meso- 

 some combined, terminal segment of medium size, and obtusely rounded at the 

 tip. Superior antennae with the basal joint much shorter than the other 3 com- 

 bined, 2nd joint comparatively large, equalling in length the outer 2 taken 

 together. Chelipeds not very strong, with the hand subtriangular and about the 

 length of the carpus. Pereiopoda comparatively small, basal joint of the 3 pos- 

 terior pairs considerably tumefied. Uropoda attaining half the length of the 

 metasome, inner ramus slender, biarticulate, outer one represented only by a 

 small knob-like projection of the basal part, carrying 2 slender seta?. Length 

 2.70 mm. 



Remarks. — This form, likewise first described by Prof. Lilljeborg, is 

 easily recognized by its extremely slender, almost filiform body, and by the 

 apparently single-branched uropoda. 



Occurrence. — I have met with this species occasionally in several places 

 on the south and west coasts of Norway, from the Christiania Fjord up to Kvalo 

 on the Nordland coast, in depths ranging from 30 to 100 fathoms. 



Distribution. — Bohuslan (Lilljeborg), Oresund (Meinert). 



4. Leptognathia brevimana (Lilljeborg). 



(PI. XIII, fig. 3). 

 Tanais bvevimmms, Lilljeborg, 1. c. p. 22. 



Specific Characters. — $ Body slender and elongated, about 10 times 

 as long as it is broad, with the cephalosome only narrowed in its most anterior 

 part. First and last segment of mesosome about same size and shorter than 

 the others, which are fully as long as they are broad. Metasome rather large, 

 considerably longer than the last 2 segments of mesosome combined, and also 

 somewhat broader, terminal segment well developed, occupying more than '/:< of 

 the metasome and obtusely rounded at the tip. Superior antenna? of the usual 

 structure, 2nd joint not quite as long as the outer 2 combined. Chelipeds not 

 very large, hand shorter than the carpus, subtriangular, fingers not attaining the 

 length of the palm. Pereiopoda comparatively small, basal joint of the 3 posterior 

 pairs less tumefied than in L. filiformis. Uropoda about the length of the ter- 

 minal segment of metasome, inner ramus well developed, biarticulate, with the 

 last joint rather short, outer ramus represented by a rather strong, mucroniform 



