484 



being subfusiform in outline, palm not defined, dactylus slender and curved. 

 Posterior gnathopoda much more slender than the anterior, and not having 

 the carpus at all expanded, propodos very narrow and about the length of 

 the carpus, with the palm very short and the dactylus extremely small. The 

 2 anterior pairs of pereiopoda nearly twice as long as the gnathopoda and very 

 slender, carpal joint longer than the meral one, dactylus rather elongated. 

 The 3 posterior pairs with the carpal and meral joints subequal in length, 

 propodal joint much shorter, dactylus of moderate length; basal joint of 

 antepenultimate pair having the infero posteal corner produced to a triangu- 

 larly-pointed lobe. Last pair of uropoda about twice the length of the 

 urosome, inner ramus a little longer than the outer, and about the length of the 

 basal part. Telson nearly twice as long as it is broad, and having on each 

 side a series of small denticles, and moreover dorsally, somewhat beyond the 

 middle, a pair of strongly-developed auditory setae, outer part gradually 

 tapering, cleft extending about to the middle, terminal lobes bidentate at the 

 tip, and carding each a long and slender spine. Body whitish, more or less 

 variegated with a reddish brown pigment. Length of adult female 9 mm. 



Remarks. This species was first described by Goes as Gammarus 

 spinosus, and was subsequently considered by Boeck as the type of his genus 

 MelpMdippa. It is easily distinguished from the other 2 species b}' the 

 character of the spinous armature of the metasome, and by the short 3rd 

 joint of the superior antennas. 



Occurrence. I have met with this form occasionally off the coast 

 of Finmark in depths ranging from 20 to 50 fathoms, and not infrequently 

 also at Bejan, in the outer part of the Trondhjemsfjord. According to 

 Boeck, it has also been found at Brettesnees (Lofoten islands) and in the 

 Hardangerfj ord. 



Distribution. Spitsbergen (Goes), the Kara Sea (Hansen), British 

 Isles (Robertson). 



2. Melphidippa macrura, G. 0. Sars, n. sp. 



(PI. 170, fig. 1.) 



Very like the preceding species as to the external appearance, but 

 having the armature of the metasome somewhat different, each segment being 

 produced dorsally to a single spiniform projection, and having the posterior 

 edge, at either side of the latter, finely denticulated; dorsal spines of the 2 

 anterior segments of urosome very much elongated and somewhat curved. 

 Cephalon small, with the lateral corners narrowly rounded at the tip. Coxal 



