14 



Fam. Pseudocyclopidae. 



Gen. Pseudocyclops, Brady. 



Remarks. Three species of this genus have as yet been recorded, one 

 from the Mediterranean and 2 from the British coast. One of the latter, 

 P. obtusalus Brady, is described in the 4th Volume of the present work, and 

 I am now enabled to add to the fauna of Norway also the 2nd British species, 

 to be described below. 



8. Pseudocyclops crassiremis, Brady. 



(PI. VIII & IX). 



Pseudocyclops crassiremis, Brady, Nat. Hist. Trans. Northumberland and Durham, Vol. IV, p. 431, 



PI. XVII, figs. 18. 



Specific Characters. Female. Body rather robust, with the anterior 

 division evenly vaulted above and somewhat compressed, seen dorsally, oblong 

 oval in outline and nearly of equal width throughout. Cephalic segment very 

 large, almost occupying half the length of the body, and obtusely rounded in 

 front, exhibiting behind the middle a rather faintly marked transverse suture, 

 inferior edges somewhat expanded in their anterior part. Rostrum very strong, 

 deflexed, and acutely pointed at the tip. Last trunkal segment deeply emar- 

 ginated behind in the middle and partly confluent with the preceding one, 

 being only defined from it by a slight sinus of the inferior edges; lateral lobes 

 broadly rounded at the end. Urosome not nearly attaining half the length of 

 the anterior division; genital segment somewhat larger than the succeeding 

 segment and slightly protuberant below; anal segment very small. Caudal 

 rami scarcely longer than they are broad, and somewhat obliquely truncated 

 at the end; apical setae of moderate length. Anterior antennas about half the 

 length of the cephalic segment, and composed of 17 joints rather densely 

 clothed with comparatively short curved setae; 1st joint much the largest and 

 rather broad, carrying, in addition to the setae, 3 slender aesthetasks. Posterior 

 antennae and oral parts of essentially same structure as in P. obtiisatus. Legs 

 likewise rather similar; last pair, however, differing in the shorter and stouter 

 form of the inner ramus, the joints of which, moreover, are almost wholly 

 coalesced. 



Male somewhat smaller than female and easily recognisable by the 

 more slender and distincly 5-articulate urosome. Rostrum, as in the male of 



