BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 27. AFD. IV. N:0 8. 91 



longer than the exopodite, and uniarticulate, although I can 

 not be quite certain as to this, as one or two articulations m-ey be 

 broken ofF. I am not able to decide if the iisual plate 

 at the base of the inner branch is wanting. I think, however, 

 that an indication of it is to be fonnd. I have marked it in the 

 figure with x. The exopodite is much smaller, and consists 

 of tive joints, the first of which is by far the largest. Thus, 

 the male pleopods deviate in some points from the allied spe- 

 cies, bnt, as this is the case even in species belonging to the 

 same genus, f. i. 3Iysideis insignis and M. grandis, I think that 

 this nnusual strnctnre ought not to prevent us from thinking 

 that Särs is right, in considering that Fseudomysis approxi- 

 mates closest to 3Iysideis. 



This species is an inhabitant of the deep basin between 

 East Greenland on the one side, and Spitzbergen-Norway on 

 the other. One of Särs' specimens was taken in the trawl 

 N.W. of Finmark at the depth of 1110 fathoms, the other 

 was fonnd in the ventricle of Uhodiclithys regina from a sta- 

 tion farther West, at a depth of 1280 fathoms. 



Length of pleon of my specimen 19 mm. Särs estimated 

 the length of his largest specimen, which, however, was not 

 fullgrown, to be about 35 mm. 



IVote. It ought to be observed that »Rivalen Sound» and 

 »Giles' Land» in this treatise are nominated respectively 

 »Bremer Sound» and »White Island» in my previous paper. 

 The reason is that I then followed the English sea-chart. 

 As Prof. Nathorst has shown that the term »Rivalen Sound» 

 has priority to ;^Bremer Sound», the former name must con- 

 quently be used. And as he has also shown that »White's 

 Island» is the same as »Giles' Land», the latter appellation 

 is the correct one. 



