Natural History of East Finmarh. 27 



Ihe first pair is in some respects not unlike that of Th. rohusta, 

 Claus, from Nice and Messina f, b"t the fifth pair in form 

 and armature is decidedly different. It may be farther 

 remarked that the structure of the first pair of feet in both of 

 tl»e species named exhibits a close resemblance to that of the 

 first pair in certain species of DactyJopus, so that the species 

 may be almost considered a connecting-link between the two 

 genera Thalestris and Dactylopus. 



Genus Pseudothalestris, G. S. Brady, 1883. 

 Pseudothalestris major (T. & A. Scott). 



1895. Pseudotvestwoodia major, T. & A. Scott, Ann. & Mag. Nat. Hist. 

 (6) vol. XV. p. 56, pi. vi. figs. 17-30. 



This small species was moderately frequent in a gathering 

 collected between tide-marks at Vadso ; but it was not 

 observed in any of the other Finmark gatlierings. 



Four British species of Pseudothalestris iuive been de- 

 scribed — the first in 1894 in the Twelfth Ann. Report of the 

 Fishery Board for Scotland, pt. iii. p. 257, pi. xi. figs. 21-29, 

 under the name of Fseudoioestvcoodia Andrewi^ T. Scott: 

 descriptions of other two species by T. & A. Scott were 

 published in the Ann. & Mag. Nat. Hist, for January 189 3 

 under the names of Pseudowesticoodia pygnuea and major ; 

 in the 'Annals' for the following month of June (p. 463)- 

 these authors withdrew the name Pseudowestwoodia, T. Scott, 

 in favour of Pseudothalestris, G. S. Brady, as it was found 

 that the two genera were identical and that the latter name 

 had been published several years before the other. Tlie 

 description of the fourth species by Prof. G. S. Brady was 

 published early in 1901 in Nat. Hist. Trans. N. D. & N. C. 

 vol. xiv. p. 59, pi. iii. figs. 11-16, under the name of Pseudo- 

 thalestris rnonensis, from specimens obtained at Port Erin, 

 Isle of Man. Pseudothalestris major has not previously been 

 recorded from the Arctic seas. 



Genus Westwoodia, Dana. 



"^ Westwoodia nohilis (Baird). 



1845. Arpadicus nobilis, Baird, Trans. Berw. Nat. Club, vol. ii. p. 155, 



This pretty little species resembles very closely the British 



species of Pseudothalestris^ but differs distinctly in the 



structure of the first pair of tlioracic feet. It was of rare 



t Diefrei lebenden Copepoden, p. 129, t. xviii. f5g.«. 17-2.3, t. xix. fig. 1. 



