12 Canon A. M. Norman — Notes on the 



lengths of the various joints are shown approximately by the 

 formula : — 



Numbers of the joints . . 1 2 3 46678 

 rroportional lengths . . 16 . 13 . 9 . 11 . 5 . 6 , 6 . 11' 



The antennae have the secondary branches three-jointed, 

 the middle joint being very small. 



The mouth-organs are somewhat similar in structure to 

 those cf Sfenhelia hispi'da, G. S. Brady. 



In the first pair of thoracic feet (fig. 11) the outer branches, 

 ■which are composed of three subeqiial joints, are rather 

 longer than the third joint of the inner branches. The inner 

 branches are comparatively short and do not greatly exceed 

 the length of the outer ones; the first joint is about one and 

 a third times the entire length of the second and third joints. 

 Tlie armature of the first pair is somewhat similar to that of 

 the third pair of StenheVia hispida. The second, third, and 

 fourth pairs resemble the same three pairs of the species just 

 referred to. 



The fifth pair are comparatively small ; the produced part 

 of the basal joints is subtriangular in outline and furnished 

 with five plumose setas — three on the inner margin and two 

 on the bluntly pointed apex. The secondary joints, which 

 extend somewhat beyond the basal joints, are subcylindrical 

 and nearly twice as long as broad, and they are each provided 

 with five setce round the distal end, as shown by the drawing 

 {Hg. 12). 



Ihe caudal furcfe are very short (fig. 1^:5). 



JIab. Bog Fiord and Klosterelv Fiord, rather rare. 



The StenheVm just described difi^ers in the structure of the 

 antennules and of the first and fifth thoracic feet from any 

 species of the genus with which I am acquainted. 



Genus Ameira, Boeck, 1864. 



Ameira longipes^ Boeck. 



1864. Ameira Ixmgipes. Boeck, Oversigt Norges Copepoder, p. 49. 



This, the only species of Ameira observed, occurred in 

 gatherings from Bog Fiord, Vadso, and Varanger Fiord, but 

 a])peared to be somewhat rare. 



