Die nordischen Schizopoden. VI 121 



partially covering the eye-stalks; terminal angle about 60^, its apex produced into 

 a Short acute point; evenly rounded at the antero-lateral corners and slightly 

 emarginate behind. 



Pleon longer than carapace; the first segment one and a half times as long 

 as the second, which is subequal to the third and fourth; fifth segment slightly 

 longer than the fourth ; sixth segment twice as long as the fifth. 



Eyes large, well developed and normal in structure; extending to the distal 

 margin of the first Joint of the antennular peduncle; pigmented portion equal in 

 width to the last pleon-segment, a minute papilla on the inner distal part of the 

 peduncle where it joins the Cornea; visual Clements well developed; pigment light 

 reddish brown. 



Antennular peduncle about twice as long as the eye; third Joint a little 

 shorter, but considerably stouter than the first and more" robust in the male than 

 in the female; second Joint small; male appendage well developed and densely 

 hirsute, but otherwise of normal appearance. 



Antennal peduncle short, not extending beyond the distal end of the 

 second Joint of the antennular peduncle and composed of three subequal quad- 

 rangular joints. 



Antennal scale about one-third as long again as the antennular peduncle 

 and twice as long as the antennal; about three and a half times as long as broad; 

 outer margin entire and terminating in a strong spine, beyond which the apex of 

 the scale is not produced; spine on the outer distal margin of the basal Joint 

 quite Short. 



Mouth-parts not exhibiting any striking points of difference from those of 

 Amblyops abbreviata, except that the second Joint of the mandibular palp is 

 considerably broader. 



First thoracic limb with the endopod almost exactly as in Amblyops abbreviata. 



Second thoracic limb with the endopod of the same form as in A. abbreviata, 

 but comparatively much longer; twice as long as that of the first thoracic limb 

 and longer than its own exopod. 



Remaining thoracic limbs rather long and slender, with the tarsus longer 

 than the merus and composed of three joints, the third Joint longer than the 

 second; dactylus well developed. 



Exopods of all thoracic limbs having the basal Joint lamelliform with a small 

 spine at the outer distal corner; flagelliform part composed of nine to ten joints. 



Incubatory lamellae of the female, two pairs. 



Pleopods in the male agreeing essentially with those of the males of the 

 genus Amblyops. 



Telson not quite so long as the last segment of the pleon and twice as 

 long as broad at its base, where the margins are slightly expanded; entire and 

 lanciform in shape, tapering distally to a narrowly rounded apex; the distal two 

 thirds of its margins armed with from twenty-eight to thirty-two spines increasing 

 in length towards the apex; terminal spine about one sixteenth of the length of 

 the telson; median setce absent from the apex. 



