ON THE LYSIANASSA MAGELLANICA ETC. 11 



bution, we give to this genus the name Eurytenes 1 ), and characterize it in 

 the following manner: 



EURYTENES, nov. gen. 



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

 Antennoe superior es fiagello appendicitlari proeditce, pedunculo crasso et ejus 

 segmentis 2:do et 3:tio brevibus, et jiagelli segmento l:mo longo. Antenna' in- 

 feriores segmento pedunculi hmo magno et inflato et extus visibili. Mandibular 

 palpAgerce acie Icevi et tuberculo molari magno instructae. Maxillae l:mi parts 

 palpo biartictdato angusto, ajdce duas vel tres setas vel acideos minores mobiles 

 gerente, et earam ramus interior latus et brevis et setts multis ciliatis in- 

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

 margine interiore tenuissime noduloso, et eorum palpus ijuadriarticulatus et 

 unguiferus. Pedes trunci sive thoracici l:mi et 2:di parts subcheliformes , illi 

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

 tissimo. lleliqui pedes trunci forma solita, robusti. Laminae branchiales 

 simplices minimeque pectinatini pdicatae. Pedes caudales ultimi paris ramis 

 lamellosis. Segmentum 7:mum sive ultimum caudae profunde bi/idum, laciniis 

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



EUKYTEINES M VGELLANICUS (II. Milne Edwaiids) 



Lysianassa magellanica, 11. Milne EDWAKDS: Annales des Sciences natu- 



rclles, 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, tig. 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" 1 to 4 ''pairs of epimera (coxae S. Bate) large, with the truncal 

 feet, with the exception of the 2"* 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 anteniue 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 tvQitizrtjc, which signifies widely stretched. 



