332 
ZOOLOGICAL LITERATURE. 
same species have been found inhabitants of the arctic and ant- 
arctic regions^ for us to admit that these arctic gigantic Amphi- 
poda are identical with that taken in the antarctic region and 
described under the name of L. magellanica. 
Prof. Lilljeborg, after a careful dissection of the northern 
form^ has arrived at the conclusion that it differs in many 
important features very considerably from the other species 
included in the subfamily Lysianassina/^ and consequently con- 
siders it desirable to establish for it a distinct genus^ which he 
distinguishes by the name of Eurytenes^ Lilljeborg^ L c. p. 11 : — 
Corporis forma crassa et robusta^ epimeris [coxa] magnis et pedibus bre- 
vibus. Antennse superiores flagello appendiculari praeditae; pedunculo crasso et 
ejus segmentis secimdo et tertio brevibus^ et flagelli segmento primo longo. 
Antennas inferiores segmento pedunculi primo magno et inflate et extus visi- 
bili. Mandibulae palpigerae acie lasvi et tuberculo molari magno instructae. 
Maxillae primi paris palpo biarticulato aiigusto^ apice duas vel tres setas vel 
aculeos minores mobiles gerente, et earum ramus interior latiis et brevis et 
setis multis ciliatis instructus. Maxillipedum lamina trunci segmenti secundi, 
sive lamina exterior margine interiore tenuissime noduloso, et eorum palpus 
quadriarticulatus et unguiferus. Pedes trunci [pereiopoda] sive tboracici 
primi et secundi paris subclieliformes, illi validi et breves, ungue bene Cvoluto, 
hi longiores et graciliores, ungue minutissimo. Reliqui pedes trunci forma 
solita, robusti. Laminae branchiales simplices minimeque pectinatim plicatae. 
Pedes caudales ultimi [uropoda] paris r(imis lamcllosis, Segmentum septi- 
mum sive ultimum caudae [telson] profunde bifidum, laciniis acuminatis ad 
apicem vero non spiniferis. 
We can see not the slightest portion of this description that 
distinguishes it from that of the genus AnonyXj and into which 
the species described as Lysiaiiassa magellanicaj with its squa- 
miform^ undivided telson, cannot enter. Prof. Lilljeborg has 
drawn up his description of the genus from the arctic specimens; 
and it is to be regretted that he should have associated it with 
the name of an animal that is peculiar to the antarctic zone 
before he had the opportunity of actual comparison. 
Eurytenes magellanica (Milne-Edwards ?), Lilljeborg, 1. c. p. 11, from tlie 
Norwegian Einmark. 
Lysianassa {Ichnopus) spinicornis (Boeck) Lilljeborg, 1. c. p. 20, from 
Bergen and Trondbjem ; L. vahli (Krdyer), Lilljeborg, 1. o. p. 21, from Bergen 
to Einmark; L. costce (Edwards), Lilljeborg, 1. c. p. 21, from Christiania. 
Anonyx ampulla (Phipps), Lilljeborg, 1. c. p. 23, tab. iv. fig. 62. Prof. 
Lilljeborg says, This species does not appear in Spence Bate’s and I. 0, 
Westwood’s ^ Biitish Sessile-eyed Crustacea.’ ” The reason is, because the 
animal described by Phipps, pi. 12. fig. 2, ‘ Voy. au Pole Bor^ale,’ under the 
name of Cancer ampulla, is not a Lysianassa at all, but the same as is de- 
scribed by Krdyer, Naturk. Tidsk. iv. 1842, p. 150, under the name of Steyoce- 
phalus injlatus. This species has not yet been found in British waters ; but 
it will be found described under the name of S. amimlla (Phipps) in the Cata- 
logue of Amphipoda of the British Museum, p. 63, and figured in pi. x. fig. 2. 
