ON THE LYSIANASSA MAGELLANICA ETC. 



11 



bution, we give to tins genus the name Eurytenes J ), and characterize it in 

 the following manner: 



EURYTENES, nov. gen. 



Corporis forma crassa et rohista, epimeris magnis et pedibus brevibus. 

 Antennce superior es flagello appendiculari prceditce, pedunculo crasso et ejus 

 segmentis 2:do et 3:tio brevibus, et flagelli segmento l:mo longo. Antennae in- 

 feriores segmento pedunculi l:mo magno et iriflato et extus visibili. Mandibxdat 

 palpigerce acie Icevi et tuber ado molari magno instructae. Maxillae hmi paris 

 palpo biartiadato angusto, apice duas vel tres setas vel aculeos minores mobiles 

 gerente, et earum ramus interior latus et brevis et setis multis ciliatis in- 

 structus. Maxillipedum lamina trunci segmenti 2:di, sive lamina exterior 

 margine interior e tenuissime nodidoso, et eorum palpus quadriartiadatus et 

 unguiferus. Pedes trunci sive thoracici hmi et 2:di paris subcheliformes , illi 

 validi et breves, ungue bene evoluto, hi longiores et graciliores, ungue minu- 

 tissimo. Heliqui pedes trunci forma solita, robusti. Laminae branch/ales 

 simplices minimeque pectinatim plicatae. Pedes caudales ultimi paris ramis 

 lamellosis. Segmentum 7:mum sive idtimum candae profunde bijidum, laciniis 

 accuminatis ad apicem vero non spiniferis. — Tantummodo una species: 



EURYTENES MAG ELLA NICUS (II. Milne Edwards) 



Lysianassa magellanica, H. Milne Edwards: Annales des Sciences natu- 



relles, 3:me serie, Zoologie, Tome 9:me; 1848; 

 pag. 398. 



„ „ C. Spence Bate: Catalogue of the specimens of 



Amphipodous Crustacea in the Collection of the 

 British Museum, pag. 66, tab. X, fig. 5. — 1862. 



Description: Length of body from end of caudal feet 2 15 / 16 inches or 

 73 millim. The three specimens we possess, which are all females, are all 

 of the same size. Form of body (PI. I. Fig. 1) stout and strongly built, 

 with the 2 ml to 4 th pairs of epimera (coxae S. Bate) large, with the truncal 

 feet, with the exception of the 2 1 " 1 pair, short and strongly formed. The 

 l:st truncal segment's epimera less than usual with that group, which causes 

 the base of the lower antennae and the appendages of the mouth to appear 

 exposed. The last segment of the trunc and the first 5 of the tail have 

 above a low longitudinal ridge, and the 6:th tailsegment has above on both 

 sides a ridge, extending backwards, and terminating in a compressed obtuse 



') From the Greek tvQvetnjg, which signifies widely stretched. 



