484 



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

 Posterior gnatbopoda mucb more slender than tbe anterior, and not having 

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

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

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

 slender, carpal joint longer than the meral one, dact^'lus rather elongated. 

 Tbe 3 posterior pairs with tbe carpal and meral joints subequal in length, 

 propodal joint mucb ^shorter, dactylus of moderate length; basal joint of 

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

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

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

 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 tbe 

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

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



Fiemarks. — This species was first described by Goes as Gammarus 

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

 Melpliidippa. It is easily distinguished from the other 2 species bj^ tbe 

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

 joint of the superior antennae. 



Occurrence. — I have met with this form occasionally oif the coast 

 of Finmai'k in depths ranging from 20 to 50 fathoms, and not infrequently 

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

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

 Hardangerfjord. 



Distribution. — Spitsbergen (Goes), tbe Kara Sea (Hansen), British 

 Isles (Eobertson). 



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



(PI. 170, tig. 1.) 



Ver3' like tbe preceding species as to tbe external appearance, but 

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

 produced dorsally to a single spiniform projection, and having tbe 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 tbe tip. Coxal 



