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Last pair of legs with the distal joint oval in form and carrying 6 marginal setae, 

 2 on the outer edge, 2 on the inner, and 2 on the somewhat exserted tip, proxi- 

 mal seta of outer edge rather coarse, spiniform; inner expansion of proximal joint 

 rather broad, but only slightly prominent, and armed with 5 rather short and 

 somewhat unequal marginal spines, the innermost but one much thicker than the 

 others and provided on each side of the short triangular point with a single small 

 hair. Ovisacs rather large and widely divergent. 



Male somewhat smaller than female, and easily recognizable by the pre- 

 hensile character of the anterior antennsR. Inner ramus of 2nd pair of legs 

 biarticulate, distal joint rather dilated at the base and exserted at the end 

 in a slender setiform appendage having in the middle a somewhat oblique row 

 of very delicate cilia, inner edge provided with 3 setse, the distal one much elon- 

 gated. Last pair of legs with the distal joint very small and quite immobile, 

 marginal set* only 4 in number and spiniform; inner expansion of proximal 

 joint very slight, and armed with a single thick spine of the same appearance as 

 the innermost but one in the female, and accompanied outside by an extremely 

 minute spinule. Genital lobes with 2 hair-like bristles, inside which is an out- 

 ward-curving spine. 



Body in both sexes of a more or less distinct reddish colour. 



Length of adult female 0.62 mm. 



Remarks. This is the form at first recorded by Boeck as the type of 

 his genus Stenhelia. The Delavalia mimica of Scot is unquestionably identical 

 with Boeck's species. The said author has recently established a new genus, 

 Beatricella, for this species, on account of the prehensile character of the inner 

 ramus of the 1st pair of legs; but as the present form in all other respects agrees 

 perfectly with the other species referred by that author to the genus Dela- 

 valia of Brady, I cannot find any reasonable support for such a generic distinction. 

 It will also be shown below, that in one of the species, described by Th. Scott 

 as Delavalia cemula, the inner ramus of the 1st pair of legs, though distinctly 

 triarticulate, has wholly lost its prehensility, as in most other species of the pre- 

 sent genus. 



Occurrence. This form is rather common in the upper part of the Chris- 

 tiania Fjord in depths ranging from 6 to 20 fathoms, muddy bottom. It also 

 occurs along the whole south and west coasts of Norway, as also in the Trond- 

 hjem Fjord (Levanger). 



Distribution. Scottish coast (Scott). 



