medial one almost attaininy tin- length of the body. Anterior antenna' rather 

 slender and attenuated, '.(-articulate, 1th joint -AT, ediiiy in length the :>rd. terminal 

 |i;irt not attaininy half tin- length of tin- proximal one. Posterior antenna' of the 

 iisuaLstnicture. Posterior maxillipeds not m-arly so powerful as in //. i-lu'li/', ,-, hand 

 ov.-il in form, \\ith the jialmar edye obtusely angular in front of the middle, daetylus 

 rather slender 1st |i;tir of leys with the rami narrower than in H. <-lidifir and the 

 :i|iie;d daws less stmn^. distal joint of outer ramus shorter than the proximal one. 

 inner ramus extending considerably he\ond the latter. Natatory legs of the usual 

 striietui-e. Last pair of leys with the distal joint rounded oval in form, and somewhat 

 constricted at the base, maryinal set;e comparatively slender: inner expansion of 

 proximal joint rather hroad. extending somewhat beyond the middle of the distal 

 joint, and almost tranversely truncated at the end. which carries 4 unequal setae 

 similar to those in //. r/mr/7/x. ()\isae comparatively small. 



M'l< exhibiting the usual sexual differences from the female. Anterior 

 antenna' distinctly hinged, thouyh haviny the last joint of the proximal part far 

 h sa tumefied than in the male of //. chrHfiT. Inner ramus of '2n>\ pair of leys 

 with the mucronate process of the middle joint comparatively shorter than in 

 that species. Outer ramus of 3rd pair less powerful and scarcely incurved, more 

 p -mblin-' that in the male of //. n iiirriiiix. Last pair of leys with the distal 

 joint oval in form, carrying .'> moderately slender seise; inner expansion of prox- 

 imal joint obsolete. 



< '"lour yellowish brown. 



Lenyth of adult female n !7 mm. 



/A///"//, . -The aho\e-de.scrilie(l form is unquestionably that recorded in 

 1'iof. |!iad\'> Monoyiaph at //. i-lirUf'rr. It is. however, not identical \\ith Miil- 

 h-i'- ipeciee, which i> described in the present woi'k on paye I'.i; but more 

 neaily related to //. i/i-nnlis ('laiix. from which it is. however, at once distinguished 

 by its much laryer si/.e. 



Occurrence. I have met \\ith this form in several places, both on the 

 "'itli and \\esi coasts of Norway. It is a pronouncedly littoral species, beiny 

 lerally found in very shallow water, especially in flat sandy creeks: and it 

 i- not seldom left in tidal pools together \\itli other littoral -pecies. 



Hritish Isles ( |',rad\ |. 



Page B7. 



/.mis *iiiiinln*, (ioodsir. 

 Pol'ir i>lamU noiih of (irinnell Land (L'nd Kram Ivx] ). 



