obtuse point. Inner ramus of 2nd pair of legs scarcely more than half as long 

 as- the outer, distal joint obliquely oval in form, basal spine slender setiform, 

 inner apical spine much coarser than the outer, which terminates in a setiform 

 point. Last pair of legs considerably smaller than in female, inner expansion of 

 proximal joint less prominent and provided with only 3 setae. 



Body variously ornamented with a more or. less deep brownish red 

 pigment. 



Length of adult female 0.87 mm. 



Remarks. This form was recorded by Baird as early as the year 1845, l ) 

 and was subsequently described and figured by the same author in his well-known 

 work on the British Entomostraca. Since that time it has been noted by several 

 authors, being an easily recognizable form, owing both to its unusually robust 

 body and to its gorgeous colour. 



Occurrence. I have met with this form in several localities both on the 

 south and west coasts of Norway, but nowhere in any abundance. It occurs in 

 the littoral and sublittoral zones among algae, and is sometimes even left in tidal 

 pools. Th. Scott records this form also from Svolvaer, in the Lofoten Islands. 



Distribution. British Isles (Baird), Heligoland (Glaus), coast of France 

 (Canu), coast of Bohuslan (coll. Clove). 



89. Westwoodia assimilis, G. 0. Sars, n. sp. 



(PI. LXXXVII). 



Specific Characters. Female. Very like the preceding species both as to 

 size and general appearance. * Rostrum, however, somewhat shorter and less acute 

 at the tip. Segments of anterior division distinctly imbricate dorsally, and more 

 evenly vaulted than in the type species. Anterior antennae still shorter and stouter 

 than in that species, but exhibiting the same number of articulations. Posterior 

 antennae and oral parts almost exactly as in W. nobilis. 1st pair of legs, how- 

 ever, differing conspicuously in the structure of the outer ramus, which is distinctly 

 biarticulate and about half as long as the 1st joint of the inner; seta of this 

 joint attached nearly in the middle. Last pair of legs likewise differing slightly 

 from those in the type species, the distal joint being comparatively larger and 

 more oval in form, with 6 marginal setae; inner expansion of proximal joint com- 

 paratively narrower, and not extending quite as far as the distal joint. 



!) Transact. Berw. Nat. Club, Vol. II, p. 155. 

 19 Crustacea. 



