Die nordischen Schizopoden. VI 137 



Antennal scale equal in length to the telson and a little longer than the 

 antennular peduncle; about four and a half times as long as broad; shortly 

 lanceolate or oval in sliape; setose all round; spine on basal Joint almost obsolete. 



Mouth-parts and thoracic limbs as described above in the generic definition. 

 The exopods have the outer corner of the basal Joint rounded and the flagelliform 

 part composed of twelve joints. 



Pleopods of the male as described for Leptomysis. The fourth pair have 

 the outer ramus longer than the inner; the last three joints are devoid of setae; 

 the antepenultimate Joint carries a single long and powerful plumose or barbed 

 spine; a similar but much shorter spine is found on the penultimate Joint, while 

 the terminal Joint has two of these long barbed spines. 



Telson a little longer than the last segment of the pleon and twice as long 

 as broad at its base; narrowing slightly towards the apex, where its breadth is 

 equal to one third of the total length; cleft very deep and fairly wide, extending 

 for one third of the total length; the apical lobe on each side of the cleft bluntly 

 rounded at its tip; cleft serrated, with about thirty spines on each side; lateral 

 margins armed throughout their entire length with about forty spines, which 

 increase slightly in length towards the apex, but there is no Single outstanding 

 long spine at the apex of each lobe as seen in species of Mysis and Schistomysis. 



Uropods broken in the specimen; inner one with a row of spines all along 

 its inner ventral margin, thirty-four being counted on that part of the uropod 

 which remained and which extended a little beyond the apex of the telson. 



Length of the only specimen (a mature male) 15 mm". (1. c.) 



Verbreitung: Bisher nur aus den irischen Gewässern (620 — 695 F. 

 Tiefe) bekannt. 



Gattung Pseudomysis G. O. Sars. 

 1879. Pseudomysis G. O. Sars, Arch. Math. & Nat., v. 4. 



Das Auge ist völlig rudimentär, nur der Stiel ist vorhanden. Die Schuppe 

 der zweiten Antenne ist lanzettförmig und rings mit Borsten besetzt. Die Füße 

 sind ziemlich kurz und schlank. Der Expodit ist stark verlängert. Der Tarsus 

 ist 7 — 8 gliedrig. Der Dactylopodit hat eine unvollkommen entwickelte Endklaue. 

 Der Statolith im Innenast der Uropoden ist sehr klein und rudimentär. Das Telson 

 ist ganz kurz und hinten dreieckig ausgeschnitten. Die Bruttasche des O besteht 

 aus 3 Paar Lamellen, von denen das erste klein ist. 



84. Pseudomysis abyssi G. O. Sars. 



Fig. 277—279. 

 1879. Pseudomysis abyssi G, O. Sars, in: Arch. Math. & Nat., v. 4, No. 4. 



