twice as long as the peduncle, and composed of about 35 articulations. 

 Inferior antennas nearly attaining the length of the body, last joint of the 

 peduncle considerably longer than the penultimate one. Gnathopoda very 

 slender, especially the posterior ones, propodos in both pairs oblong, and much 

 shorter than the carpus. Anterior pairs of pereiopoda with the propodal 

 joint rather elongated and slender, dactylus somewhat shorter. Last pair 

 of pereiopoda with the posterior expansion of the basal joint very large, 

 reaching nearly to the end of the carpal joint, anterior and inferior edges 

 not distinct from each other, both forming together quite an even curve, carpal 

 joint fully as long as the 2 preceding ones combined, and rather expanded 

 in its outer part, propodal joint nearly of same length, but very narrow, 

 linear in form. Last pair of uropoda with the rami but very slightly ser- 

 rated on their opposite edges, inner ramus with 5 rather coarse denticles 

 inside. Telson rather small, subquadrangular in form, scarcely tapering 

 distally, tip transversely truncated, with 2 apical spinules, cleft not exten- 

 ding to the middle. Body highly pellucid, with dark violet intestine shining 

 through the integuments, sides partly mottled with pure white. Length of 

 adult female scarcely exceeding 8 mm. 



li't'Diarl'x. The present species, shortly described and figured by 

 the author in the above cited paper, is easily distinguished from any of the 

 3 preceding species by the bright red ocular pigment, as also by the less 

 unequal antennae. It is also rather inferior in size. 



Occurrriicc. I have only met with this form in 2 localities, viz, at 

 Magero, west coast of Norway, and at Bejan, outer part of the Trondhj ems- 

 fjord. It occurred here rather sparingly in a depth of 80 100 fathoms, 

 muddy bottom. Out of Norway, it has not yet been recorded. 



18. Byblis crassicornis, Metzger. 



(PI. G6, fig. 1). 

 Bijllis crassicornis, Metzger, Nordseefahrt cler Pommerania. Crustacea, p. 297, PI. VI, fig. 9. 



Form of body slender. Cephalon nearly as long as the first 3 seg- 

 ments of mesosome combined, frontal part somewhat tapering and narrowly 

 truncated at the tip, inferior corners but little projecting, though distinctly 

 angular. First pair of coxal plates gradually widening below, terminal edge 

 evenly curved. Last pair of epimeral plates of metasome gently rounded at 

 the lateral corners. Corneal lenses wholly wanting. Antennae nearly equal- 

 sized, and attaining in length about 2 /3 of the body; peduncle of the superior 

 ones reaching considerably beyond the penultimate peduncular joint of the 



