Natural History of East Finmark. 9 



appearance and in size Ectinosoina propinquum resembles 

 Ectinosoma Sarsi and may readily be mistaken for it ; but 

 one of the more obvious differences, and one I have found 

 constant in all the specimens examined, is that in E. pro- 

 pinquum the fifth thocacic feet are shorter iu proportion to 

 their width, /. e. each of the fifth pair is about as broad as 

 long, whereas in E. Sarsi the length is greater than the 

 width. 



Ectinosoma curticorne, Boeck. 



1864. Ectinosoma curticorne, Boeck, Oversigt Norges Copepoder, p. 13. 



Ectinosoma curticorne, which is a small species of a 

 brownish colour, was obtained in Bog Fiord and between 

 tide-marks at Vadso, but it was less frequent in the Vadsii 

 gathering than in that from Bog Fiord. 



Ectinosoma erytJirops, G. S. Brady. 



1880. Ectinosoma erythrops, G. S. Brady, British Copepoda, vol. ii. 

 p. 12, pi. xxxvi. figs. 11-17. 



The only gathering in which this species was observed 

 was collected in Lakse Fiord ; very few specimens were 

 obtained. 



Ectinosoma Normani, T. & A. Scott. 



1896. Ectinoso7na Normani, T. & A. Scott, torn. cit. p. 485, pi. xxxvi. 

 figs. 21, 29, 39, pi. xxxvii. figs. 12, 26, 34, 51, pi. xxxviii. figs. 5, 18, 

 42, 45. 



This species occurred very sparingly in a gathering from 

 Vadso Sound — the only one in which it was observed. 



Ectinosoma finmarchicum J sp. n. 

 (PL I. figs. 7-13.) 



An Ectinosoma which differs to some extent from any 

 species known to me, and which I propose to describe under 

 the above name, was also obtained in Vadso Sound. 



The female (fig. 7) is moderately slender and elongated 

 and has a general resemblance to Ectinosoma Herdmani, 

 T. & A. Scott, but the form and especially the armature of 

 the fifth pair of thoracic feet differ to a considerable extent ; 

 in the preeent species the joints of the fifth pair (fig. I'd) are 

 rather longer in proportion to their breadth, and the inner 

 one of the two apical setse on the basal joint and the middle 

 seta of the secondary joint are each of them about twice as 

 long as the others; but in Ectinosoma Herdmani the terminal 

 setae of the fifth pair in the female are all of nearly equal 



