577 



in form, not nearly twice as long as it is broad, palm having in the middle 

 a deep sinus defined by 2 projecting lobes, the posterior of which is acute, 

 the anterior subtruncate at the tip, dactylus very strong and curved. The 

 2 anterior pairs of pereiopoda with the meral joint not nearly as long ;is 

 the 2 outer ones combined ; the 3 posterior pairs comparatively more strongly 

 built than in the type species, basal joint of the antepenultimate pair rounded 

 and rather broad, that of the last 2 pairs oval in form. Last pair of 

 uropoda with the rami not quite as long as the basal part, and somewhat 

 unequal, the inner one being the larger and tipped by 2 slender bristles. 

 Telson fully as broad as it is long, and having on either side of the obtusely 

 produced tip 3 slender spines. Body more or less variegated with a dark 

 brown pigment, especially accumulated along the sides of the segments 

 and around the intestine. Length of adult female 7 mm, of male about 

 the same. 



Remarks. I fully agree with Prof. Meinert that the Ncenia excavata 

 and N. rimapalmata of Sp. Bate are only the 2 sexes of one and the same 

 species, -and that Xenoclea Batei of Boeck is identical with this species. As, 

 however, Sp. Bate's descriptions were published some years earlier than that 

 of Boeck, one of his specific names, and more properly that given to the 

 female, ought to be retained for the species. From the preceding form this 

 is at once distinguished by the somewhat more robust body, the great 

 development of the anterior lobe of the 5th pair of coxal plates, the black 

 eyes, and the rather different shape of the posterior gnathopoda in the 2 

 sexes. Finally, the colour of the body is very different. 



Occurrence. I have met with this form in 3 different localities of 

 the Norwegian coast, viz., at Mserdo near Arendal, at Magero, south of the 

 Trondhjemsfjord, and at Bejan, at the entrance of that fjord. In all 3 loca- 

 lities it occurred quite solitary in depths of 3040 fathoms. Boeck records 

 it from the Christianiafjord and at Haugesund. 



Distribution. British Isles (Sp. Bate), Kattegat (Meinert), Dutch 

 coast (Hoek). 



Fam. 22. Podoceridae. 



Body more or less slender, smooth, with the coxal plates of moderate 

 size or very small; 4th pair of same shape as the preceding ones. 5fh pair 



