85 



Gen. 21. Euryporeia, G. o. 



Syn: Eurytenes, Lilljeborg (not Foreter). 



Body large and massive, with, comparatively low coxal plates. (Vphalon 



short and broad, only very little produced at the lateral conn-is and m-arlv 

 entirely exposed together with the large and protruding huccal mass. Meta- 

 some and urosorae both powerfully developed. Eyes with imperfectly <!<- 

 veloped visual elements. Superior antennae of moderate length, peduncle not 

 very tumeficated, flagellum composed of numerous short articulations; accessory 

 appendage well developed. Inferior antennae in female much longer than the 

 superior, basal joint very large and globular, flagellum slender and mult iaii i- 

 culate. Epistome not defined from the anterior lip, both together forming a 

 broadly rounded prominence in front of the buccal area. Posterior lip large, 

 membranous, lobes insinuated at the tip. Mandibles very strong, cutting edge 

 broad and straight, molar expansion large and protruding, palp not very 

 elongate, originating nearer the extremity of the mandible than does the latter. 

 First pair of maxillae with the masticatory lobe large and massive, oblique! y 

 truncated and armed with strong denticulated spines, basal lobe small, Avilli 

 numerous plumose setas on the rounded extremity, palp very narrow, not ex- 

 panded at the tip. Second pair of maxillse with the inner lobe much shorter 

 than the outer, both densely setous. Maxillipeds strong, masticatory lobe 

 broadly oval not reaching beyond the antepenultimate joint of the palp, the 

 latter very large, with the joints considerably expanded and densely setous, 

 terminal joint claw-like. Anterior gnathopoda short and stout, propodos ta- 

 pering distally and having a distinctly defined palmar edge. Posterior gnatho- 

 poda extremely slender, propodos nearly linear and but little produced at the 

 tip beneath the minute dactylus. Pereiopoda comparatively short and stout, 

 basal joint of the 3 posterior pairs moderately expanded, meral joint of those 

 legs rather large and angularly produced posteriorly. Last pair of uropoda 

 considerably projecting beyond the preceding pairs, rami foliaceous and densely 

 setous on the inner edge. Telson very elongate, conically tapering distally, 



and deeply cleft. 



Remarks. In 1865 Prof. Lilljeborg established this genns to include 

 the remarkable gigantic form described by Milne Edwards under the name of 

 Lysianassa magellanica. The denomination Euriff<'n<' proposed by him having, 

 however, been before adopted for a genus of Hymenoptera, [ have changed the 

 latter half of the compound, still conserving tin- signiticatimi of the 

 name as intended by Prof. Lilljeborg. The genus would seem to combine some 

 characters of the genera Auoni/.r and OHMI'DHI*, still exhibiting a number of 

 characters of its own. 



12 Crustacea. 



