92 



sideraljly projecting beyond tlie preceding paii', rami minutely denticulated and, 

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



Remarks. — I liavefelt 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 

 auntiimy of this latter form witii that- of Anonyx mtgax, the type of the genus 

 Anonyx as restricted by Boeck, several very marked differences apparently 

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

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

 which is also partly the case with the 2nd pair of maxillae and the maxilli- 

 peds. The most striking ditference, however, consists in tlie 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 

 thei'e is a perfect concordance Ijctween the different species of the present 

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

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

 the Anonyx cicadoides, de.scribed by the Rev. Mr. Stebbing from the Challenger 

 Expedition. 



38. Hoplonyx cicada, (Fabr.) 



(PI. 32, fig. 2.) 

 Onisciif: ricnrla, O. Fabi'., Fauna Groenlandiiia. No. 233. 

 Sj'n: Anonyx gulosus, Kroyer. 

 » » norvegicus, Lilljeborg. 



» » Holbolli, Sp. Bate (not Kroyer). 



Body somewhat tumid, with bi'oadly 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 

 tlie bodv and increasing successively in size posteriorly; 4th pair proiluced 

 lielow tlie posterior emai'gination to a rather narrow lolie, 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 withotit any distinct dorsal depression. 

 E3'es not very large, superior part narrow linear, inferior transversely oval, 

 pigment bright red. Superior antenna* about the length of the cephalon and 



