48 



Subsection i. Dactylopoda. 



Character, Kir-t pair of legs unlike the others, and more or less 



distilirth prehensile. 



Fam. 5. Harpacticidae. 



Cli<ii-iirl, /-. I'x-dy of various form, in some cases slender .and compressed 

 sub-depress, -d. in other cases much abbreviated and flattened. Rostrum well 

 defined at the base, and to some extent mobile. Eye present. Anterior antennae 

 :nparati\el\ -lender, with the proximal part consisting of 4 well-defined joints, 

 terminal part of 4 >r r> mneh smaller articulations; those in male strongly pre- 

 hensile, terminating in a clawed hand. Posterior antennae rather powerful, biarti- 

 culate. distal joint inure or less spatulate, and armed at the tip with 3 strong, 

 daw-like spine-, and behind them with \ geniculated setre, outer ramus comparatively 

 small, and issuing from the middle of the proximal joint. Mandibles highly in- 

 crustateil. with short and blunt cutting teeth, palp of moderate size, with 2 slender 

 n\ed rami. .Maxillie normal. Anterior maxillipeds short and stout, with 

 ral digitifnrm lobes in front, the outermost one carrying an unguiform spine. 

 l'u-terir maxilliped- more or less powerfully developed, subcheliform. First pair 

 nf h-^s with both rami distinctly prehensile and very unequal, the outer one being 

 much the longer, and armed at the tip with a number of curved claws, the inner 

 one with a single such claw. Natatory legs with both rami 3-articulate, the outer 

 niie hein^ the larger. Last pair of legs lamellar, biarticulate, proximal joint in 

 female mure or less expanded inside. Ovisac single. 



"Remarks. In the restriction here adopted, this family is chiefly charac- 

 teri-ed h\ the structure of the 1st pair of legs, the rami of which are very unequal 

 in leiiL'th and both prehensile. It comprises at present 3 genera, all of which 

 are represented in the fauna of Norway. 



