160 



rather strong, innermost seta very small and hair-like. Anterior antennae slender 

 and attenuated, 8-articulate, 4th joint more than twice as long as the 3rd, terminal 

 part exceeding half the length of the proximal one. Posterior antennse with the 

 outer ramus very narrow and composed of only 2 joints, the middle one not 

 being defined. Oral parts quite normal. 1st pair of legs with the outer ramus 

 nearly as long as the 1st joint of the inner, last joint scarcely shorter, but nar- 

 rower than the middle one, and armed with 4 spines and inside them with a geni- 

 culated seta; inner ramus with the 1st joint very narrow and more than twice as 

 long as the other 2 combined, last joint linear and about twice as long as the 

 2nd, apical claw rather strong and distinctly denticulate on the one edge. Na- 

 tatory legs well developed and of normal structure. Last pair of legs with the 

 distal joint oval in form and provided with 6 marginal setse. the 2 apical ones 

 very slender; inner expansion of proximal joint rather broad and obliquely trun- 

 cated at the end, extending beyond the middle of the distal joint, marginal setse 

 5 in number, the 2 innermost ones spiniform, minutely bifid at the tip. Ovisacs 

 comparatively large and somewhat diverging. 



Male with the 2nd basal joint of the 1st pair of legs produced inside to 2 

 or 3 strong spiniform projections, in front of which is a small knob-like promin- 

 ence. 2nd pair of legs with the 2 first joints of the outer ramus considerably 

 produced at the outer corner, and having the spines, especially that of the 2nd 

 joint, much coarser than in female; inner ramus transformed in the usual manner. 

 Last pair of legs, as usual, smaller than in female, with the inner expansion of 

 the proximal joint conical in form and carrying 2 rather thick setse on the tip. 



Body of a light yellow colour, with a more or less distinct reddish tinge; 

 intestine generally dark-coloured. 



Length of adult female 0.80 mm. 



Remarks. It seems to me rather questionable if the above-described form 

 is in reality that originally recorded by Glaus as Dactylopus longirostris. It is 

 however beyond doubt that Boeck's Diosaccus longirostris is the present species, 

 as also the form recorded by Th. Scott from Finmark as Dactylopus longirostris, 

 var. arctiea. For this reason, and as the description and figures given by Glaus 

 are too imperfect to admit of any certain identification, I think that the specific 

 name longirostris ought more properly to be applied to the present species. The 

 Stenhelia longirostris of Norman & Scott is a very different species; and as it 

 belongs to the same genus as Claus's species, its specific name must be altered. 



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

 south and west coasts of Norway; and Mr. Scott also records it from the Finmark 

 coast. It generally occurs in depths ranging from 20 to 50 fathoms. 



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



