

143 



antennae more slender than in the 2 preceding species, but otherwise of a 

 similar structure. Oral parts likewise constructed upon the very same type. 1st 

 pair of legs with the outer ramus distinctly biarticulate and about half the length 

 of the 1st joint of the inner ramus; seta of this joint attached considerably in 

 front of the middle, apical claws of the same ramus very slender. Last pair of 

 legs with the distal joint very small, carrying 5 slender setae; inner expansion of 

 proximal joint considerably produced, extending far beyond the distal joint. 



Male of about the same size as female, and not very different in external 

 appearance. Anterior antennae transformed in the usual manner. Inner ramus 

 of 2nd pair of legs with the distal joint oblong oval in form, apical spines about 

 as in W. nobilis, basal spine, however, much stronger. Last pair of legs, as usual, 

 smaller than in female, with the inner expansion of the proximal joint less pro- 

 minent, and provided with only 3 setae. 



Colour light chestnut-brown, with a very dark shade on each side of the 

 cephalic segment behind. 



Length of adult female 0.50 mm. 



Remarks. There cannot, in my opinion, be any doubt that the above- 

 described form is that originally recorded by Glaus as Westwoodia minuta, and 

 that both Pseudotlialestris monensis of Brady and P. major of Scott belong to the 

 very same species. In its structural details it shows a near relationship to the 

 2 preceding species, and cannot by any means be generically separated from them. 



Occurrence. I have found this form occasionally in several localities on 

 the south and west coasts of Norway, as also in the Trondhjem Fjord, in moderate 

 depths among algae; and Th. Scott also records it from the Finmark coast. A 

 peculiarity of this species is that in the living state, when disturbed, the animal 

 secretes a clear viscid fluid in considerable quantity. From which organ this 

 matter is derived, I have not yet been enabled to determine. 



Distribution British Isles (Brady, Scott), Heligoland (Glaus). 



91. Westwoodia pygmaea (Scott). 



(PI. LXXXVIII, fig. 2). 



Pseudou-estwoodia pygmcea, Scott, Ann. & Mag. Nat. Hist, for January, 1895, p. 55, PL VI, 



fio-s. 816. 



Syn: Pseudothalestris pygmcea, Scott. 



Specific Characters. Female. Body still shorter and stouter than in W. 

 minuta, with the segments of the anterior division very pronouncedly imbricate 

 dorsally. Cephalic segment of quite an extraordinary size, almost twice as long 



