92 



siderably projecting beyond the preceding pair, rami minutely denticulated and, 

 as a rule, densely setous on the inner edge. Telson oblong, deeply cleft. 



Remarks. I have felt justified in establishing this new genus to include 

 several nearly allied forms which, though evidently specifically distinct, yet 

 agree in all essential anatomical characters very closely with the species gen- 

 erally known under the Kroyerian name Anonyx gulosus. On comparing the 

 anatomy of this latter form with that of Anonyx nugax, the type of the genus 

 Anonyx as restricted by Boeck, several very marked differences apparently 

 of generic value will be found to exist. Thus, the epistome is distinctly pro- 

 jecting, though rounded in front, and the mandibles rather differently constructed, 

 w T hich is also partly the case with the 2nd pair of maxillse and the maxilli- 

 peds. The most striking difference, however, consists in the structure of the 

 anterior gnathopoda, which are much more slender than in Anonyx and exhi- 

 bit a rather different proportion of the several joints. Moreover the dactylus 

 of these limbs exhibits a very peculiar and complicated structure, which has 

 given rise to the generic denomination here proposed. In all those points 

 there is a perfect concordance between the different species of the present 

 genus. Their number would seem to be rather large. In the following pages 

 will be described no less than 6 Norwegian species, to which, moreover, comes 

 the Anonyx cicadoides, described by the Rev. Mr. Stebbing from the Challenger 

 Expedition. 



38. Hoplonyx cicada, (Fabr.) 



(PL 32, fig. 2.) 



Oiiifscus cicada, O. Fabr., Fauna Groenlandira. No. 233. 

 Syn: Anonyx gulosus, Kroyer. 



norvegicus, Lilljeborg. 



Holbolli, Sp. Bate (not Kroyer). 



Body somewhat tumid, with broadly rounded back. Cephalon longer 

 than the 1st segment of mesosome, lateral corners but very slightly projecting 

 and rounded at the tip. Anterior coxal plates more than twice as deep as 

 the body and increasing successively in size posteriorly ; 4th pair produced 

 below 'the posterior emargination to a rather narrow lobe, obtuse at the tip ; 

 5th pair rather large, nearly as deep as broad. Last pair of epimeral plates 

 of metasome nearly rectangular, infero-lateral corners drawn out to a very 

 short point. First segment of urosome without any distinct dorsal depression. 

 Eyes not very large, superior part narrow linear, inferior transversely oval, 

 pigment bright red. Superior antennae about the length of the cephalon and 



