295 Canon A. M. Norman and Dr. T. Scott on 



the outer margin, three on the truncated apex, and one on 

 the inner margin. 



The furcal joints are very short. 



The male does not differ greatly from the female except in 

 the following particulars : — the antennules are modified for 

 grasping, the outer branches of the second thoracic feet are 

 armed with stronger spines than the same pair in the female, 

 and the inner branches are only two-jointed, and the terminal 

 spine is stout and claw-like. 



The fifth pair are rather smaller than those of the female 

 and the inner and broadly rounded portion of the basal joint 

 bears only two apical spines. 



Hah. Dredged at various places on the coast of Devon ; 

 moderately frequent. Also at Fowey, Cornwall, and New 

 Grimsby Harbour, Scilly Islands. 



Recently collected specimens were easily recognized by 

 their peculiar colour, which was for the most part of a uniform 

 yellow or, in some examples, yellowish grey; but what 

 rendered the specimens so conspicuous was a band of a fine 

 purple colour which adorned the posterior portion of the 

 cephalic segment ; this band, which covers about a third of 

 the segment, does not extend right across, but terminates on 

 each side a short distance from the lateral margins ; more- 

 over, the posterior edge of the band is even and coincides 

 with the edge of the cephalic segment, but the anterior edge 

 is deeply crenulated. Immersion in methylated spirit speedily 

 destroys the purple colour, but the colour remains intact for 

 a considerable time if specimens be preserved in formalin. 



Dactylopusia purpurocincta, sp. n. 



In this species the body is depressed, but moderately 

 stout, and in general appearance resembles D. flava, Claus; 

 length about "5 mm. 



Seen from above the cephalothoracic segment is broadly 

 and evenly rounded in front and about as long as the 

 remaining segments of the thorax ; the three segments imme- 

 diately posterior to that of the cephalothorax are of a dark 

 purplish-brown colour, but the ground-colour of the body is 

 light yellowish. 



The antennules are short and stout and appear to be com- 

 posed of seven joints ; the first and second, which are robust, 

 are longer than the others. The formula shows approxi- 

 mately the proportional lengths of the various joints — 



Proportional lengths of the joints. . 14 . 13 . 8 . 8 . 5 . 3 . 7 

 Numbers of the joints "1 2~3~4 5 6 7" 



