85 



Gen. 21. Euryporeia, (l. O. 8ars. 

 Syn : Eurytenes, Lilljeborg (not Forstfr). 



Body laige and massive, with comparativeh' low coxal plates. Cephalon 

 short and broad, only very little produced at tlie lateral corners and nearly 

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

 some aiul urosome Ijoth jjowerfully developed. Eyes with imperfectly de- 

 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 mucli longer than the 

 superior, basal joint very large and globular, flagellum slender and nmltiarti- 

 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 

 Ijroad and straight, molar expansion large and protiaiding, jjalp not x&ry 

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

 First pair of maxillae with the masticatory lobe large and massive, obliquely 

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

 numerous plumose setae on the rounded extremity, palp xBvy narrow, not ex- 

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

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

 liroadly oval not reaching bej^ond the antepenultimate joint of the paljj, the 

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

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

 pering distally and having a distinctly defined palmar edge. Postei'ior gnatho- 

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

 tip beneath the minute dactylus. Pereiopoda comp)aratively short and stout, 

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

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

 considerably projecting beyond the preceding pairs, rami foliaceous and (lensel\- 

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

 and deeply cleft. 



Remarks. — In 1865 Prof. Ijilljeborg established this genus to include 

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

 Li/sidHcissa magellanira. The denomination Eiin/feiies proposed by him having, 

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

 latter half of the compound, still conserving the signification of the 

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

 characters of the genera Anoni/.r an<l Onpsiinits, still exhibiting a niuuber of 

 characters of its own. 



12 — Crustacea. 



