86 



;'r) Euryporeia gryllus, (Mandt). 

 (I'l. at).) l:> 

 Lysimiassa (/i-i/lhix, JNlamlt, Observatioiics in histoi'iam iiaturaleni in itinereGrocnlandino i\\cUc 



1822. p. 34. 

 ■ Syn: Lysianassa magellanica, M. Edw. 



Body rather thickset and strongly l)nilt, with broadly rounded hack 

 and the segments very sharply demarcated. Cephalon .shorter than the 1st 

 segment of mesosome, rather tumid, nearly globulai", lateral corners very small 

 and narrowly rounded. First jiair of coxal plates extremely small, rounded, 

 leaving the lateral faces of the cephalon uncovered; the 3 succeeding pairs 

 successively increasing in size ; 4th pair a little deeper than the body, rather 

 expanded below and angularly produced posteriorly; 5th pair nearly twice as 

 broad as deep. Last segment of metasome provided with a very conspicuous 

 dorsal, indentation at some distance from tlie base, epimeral plates rounded at 

 the infero-lateral corners. First segment of urosome with a similar dorsal in- 

 dentation as in the preceding segment. Eyes irregularly lageniform, being con- 

 stricted at the middle and Imving the inferior part expanded to two diverging 

 lolies; pigment light orange-coloured. Supei'ior antennte about twice the length 

 of the cephalon, 1st joint of the peduiude somewhat longer than the other 2 

 combined; flagellum nearly three times as long as the })eduncle and composed 

 of aboiit 30 articulations, the 1st of which is very large; accessory appendage 

 about half the length of the flagellum and 10-articulate, 1st joint the largest. 

 Inferior antennae nearly twice tlie length of the sujierior, last joint of the 

 peduncle longer than tlie preceding one; flagellum very slender, densely setous 

 on tlie posterior edge and composed of about 50 articiilations. Anterior gnatlio- 

 poda witli the propodos longer than the carpus, palmar edge somewliat oblique 

 and defined below by a well marked angle. Posterior gnathopoda fully twice 

 tlie length of the anterior; propodos somewliat shorter and much narrower 

 tlian the carpus, l)oth densely setous. Pereio])oda witli numerous tufts of small 

 seta? on tlie edges; basal joint of 3rd ]tair very broad, nearly elliptical in 

 form, that of tlie 2 posterior [lairs more regularly oval; meral joint in botli 

 these and the 3rd pair very large and expaiuled, terminating posteriorly witli a 

 pointed deflexed lobe. Last pair of urojxjda witli the inner ramus somewliat shorter 

 tlian the outer, terminal joint of the latter very small, aculeiform. Telson 

 nearly extending to the tip of tlie last pair of uropoda, ccmico-acuminate in 

 form, and without any denticles, cleft extending far beyond the middle, very 

 narrow, fissure-like. Colour^ rosy with a yellowish tinge, edges of tlie 



' According- to Uie statements of Dr. K. Clievreiix, 



