38 



as they are broad, apical setae rather slender. Anterior antennae comparatively 

 short, though longer than in the 2 preceding species, and composed of 6 arti- 

 culations. Anterior lip with a small recurved projection in front. Last pair of 

 legs of moderate size, with the marginal spines very unequal, distal joint much 

 longer than the proximal one and subquadrangular in form, innermost apical 

 spine very short, appendicular bristle, as in most other species, remote from the 

 margin; inner expansion of proximal joint extending almost to the tip of the distal 

 joint, outer spine remarkably thickened, somewhat resembling that in E. melani- 

 ceps, though considerably more elongated. 



Colour grayish white. 



Length of adult female 0.58 mm. 



Remarks. I cannot identify this form with any of the species described 

 by Messrs. Th. & A. Scott. The specific name here proposed refers to the some- 

 what mixed characters, some of which resemble those of E. curticorne, and some 

 those of E. melaniceps. 



Occurrence. Only some few specimens of this form have hitherto come 

 under my notice. They were taken in the upper part of the Christiania Fjord, 

 near the town, in a depth of about 3 fathoms, muddy bottom. 



24. Ectinosoma brevirostre, G. 0. Sars, n. sp. 



(PI. XXI, fig. 2). 



Specific Characters. .Female. Body comparatively slender and somewhat 

 compressed, with the cephalic segment, seen dorsally, but slightly contracted in 

 front, rostral plate remarkably short and blunt at the tip. Caudal rami longer 

 than they are broad, and somewhat obliquely truncated at the tip, apical setae of 

 moderate length. Anterior antennae more slender and attenuated than in E. mix- 

 turn, but, as in that species, 6-articulate. Anterior lip with a similar acute 

 recurved projection in front. Last pair of legs with the proximal joint rather 

 large and broad, distal joint considerably shorter, being scarcely longer than it 

 is broad, innermost apical spine exceeding half the length of the outermost one, 

 appendicular bristle issuing near the margin; inner expansion of proximal joint 

 scarcely extending beyond the middle of the distal joint, and exhibiting at the 

 base an oblique transverse row of delicate spinules. outer apical spine of quite 

 normal appearance. 



Colour yellowish gray. 



Length of adult female 0.55 mm. 



