48 

 Subsection i. Daetylopoda. 



Chief Cliaracter. First pair of legs unlike the others, and more or less 

 distinctly prehensile. 



Fam. 5. Harpacticidae. 



Characters, Body of various form, in some cases slender and compressed 

 or sub-depressed, in other cases much abbreviated and flattened. Rostrum well 

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

 comparatively slender, with the proximal part consisting of 4 well-defined joints, 

 terminal part of 4 or 5 much smaller articulations; those in male strongly pre- 

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

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

 claw-like spines, and behind them with 4 geniculated setse, outer ramus comparatively 

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

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

 recurved rami. Maxillse normal. Anterior maxillipeds short and stout, with 

 several digitiform lobes in front, the outermost one carrying an unguiform spine. 

 Posterior maxillipeds more or less powerfully developed, subcheliform. First pair 

 of legs 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 

 one being the larger. Last pair of legs lamellar, biarticulate, proximal joint in 

 female more or less expanded inside. Ovisac single. 



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

 terised by the structure of the 1st pair of legs, the rami of which are very unequal 

 in length and both prehensile. It comprises at present 3 genera, all of which 

 are represented in the fauna of Norway. 



