72. Leptocletodes debilis, G. O. Sars, n. sp. 



(PI. LXI). 



Specific Characters. Female. Body rather slender and narrow, with 

 the anterior division only slightly dilated, though somewhat broader than the 

 posterior. Cephalic segment exceeding in length the 2 succeeding segments 

 combined, and somewhat vaulted dorsally; frontal margin slightly produced in 

 the middle, though not forming any true rostrum. Last trunkal segment com- 

 paratively small. Urosome not attaining the length of the anterior division, 

 and rather narrow, cylindrical in form; genital segment fully as long as the 2 

 succeeding segments combined and imperfectly subdivided in the middle; last 

 segment oblong quadrangular in outline, with the anal opercle broadly truncated 

 at the end and perfectly smooth. Caudal rami widely apart, and narrow linear 

 in form, not however attaining the length of the anal segment, both the outer 

 and inner edge carrying beyond the middle a small seta; dorsal seta issuing 

 near the end of the ramus; apical setse rather slender. Anterior antennae fully 

 as long as the cephalic segment and composed of 7 well defined joints clothed 

 with scattered comparatively short setae; the first 2 joints about equal in size, 

 each of them equalling in length the 2 succeeding joints combined; terminal 

 part of the antenna, composed of the 3 outer joints, almost as long as the 

 proximal one, with the last joint rather large, fully as long as the other 2 

 combined. Posterior antennae rather feeble, with the outer ramus very small, 

 uniarticulate, and tipped by a single seta. 1st pair of natatory legs, as usual 

 smaller than the others, with the rami less unequal in length, the outer one 

 being only slightly longer than' the inner and without any setae inside. The 

 3 succeeding pairs of legs with the outer ramus very slender and narrow, inner 

 one successively somewhat diminishing in length, extending in 2nd pair beyond 

 the middle joint of the outer, in 4th pair only as far as the 1st joint of that 

 ramus. Last pair of legs with the proximal joint produced outside to a long 

 digitiform process tipped with a slender bristle, inner part of the joint not at 

 all expanded, and only provided behind with a single seta arising from a 

 knoblike prominence of the margin; distal joint greatly produced and narrow 

 linear in form, though a little dilated in its outer part, and carrying 4 com- 

 paratively small marginal setae, 2 lateral and 2 apical. 



Colour whitish pellucid. 



Length of adult female 0.63 mm. 



Remarks.- In its outward appearance this form somewhat reminds on 

 Fultonia hirsuta Scott (see Vol. V, p. 341), which however otherwise is rather 



