246 



spiniale, its edge irregularly sinuated, and forming anteriorly a slight 

 expansion divided into 6 coarse serrations, behind which there is a small, 

 iinelydenticulated elevation, dactylus rather strong and curved. Same legs 

 in male much larger than in female, and very unlike in shape, the propodos 

 being considerably produced, and much narrower in proportion to its length, 

 with the inferior edge nearly straight, and densely hairy, exhibiting besides 

 2 coarse dentiform processes, and terminating in front with a lamellar 

 expansion, finely serrated on the edge ; dactylus very much elongated, and ciliated 

 on the inner edge. Second pair of pereiopoda much stronger than the 1st; 

 the 3 posterior pairs successively diminishing somewhat in length, meral 

 joint very large, and produced, on the last 2 pairs, nearly to the end of the 

 carpal joint; basal joint of penultimate pair oval quadrangular, of last pair 

 obliquely rounded. Last pair of iiropoda rather short and stout, basal 

 joint somewhat longer than the other 2 combined, and armed with 6 short, 

 but rather strong denticles. Telson oblong, fully twice as long as it is 

 broad, and armed witli 4 pairs of dorsal denticles, outer part tapering to 

 an acute point. Body whitish, pellucid, with scattered orange-coloured 

 patches ; ova in the marsupial pouch greenish. Length of adult female 

 5 mm, of male G mm. 



Brniarks. — I first described this form as a Metopa, on account of 

 its being provided witli distinct mandibular palps. On a closer anatomical 

 examination, I have, however, found it to differ from that genus in a few 

 essential characteristics, apparently of generic value, some of which point to 

 its close relationship to the Mediterranean form, upon which Costa founded 

 his genus Frobolimti. The present species cannot properly be confounded 

 with any other of the northern Stenothoidae. 



Occurrence. — The species was detected by me, several years ago, 

 off the west coast of Norway, at Bekkervig, where a considerable number 

 of specimens, nuiles and females, were picked up from a finely-ramified alga, 

 brought up by the dredge, from a depth of 50 to 80 fathoms. Siibse([uently 

 I have also found it not infrequently in the Trondhjemsfjord in several 

 places, and at de|)ths varying from 40 to 100 fathoms. Out of Norway, it 

 has not yet been recorded. 



