360 THE VOYAGE OF H.M.S. CHALLENGEE. 



1865. LiLLJEBORG, AV. 



Bidrag till kannedomen om underfamiljen Lysianassina inom underordningeii 

 AmpMpoda bland kraftdjuren. 



On the Lysianassa magellanica H. Milne Edwards, and on the Crustacea of the 

 suborder Amphvpoda and subfamily Lysianassina found on the coast of Sweden 

 and Norway. By William Lilljeborg. With 5 Plates. Upsala, mdccclxv. (Nova 

 Acta Reg. Societ. Scient. Upsal. IIP Serie.) 



The two papers, written in different languages by the same author, are essentially the 

 same. In the suborder Ampbipoda Lilljeborg mentions as common to both the arctic and 

 antarctic zones the genera Orchestia, Leach, Anonyx, Kroyer, IpMmeclia, Rathke, Atylus, 

 Leach, AmpliHhoe, Leach, nijperia, Latreille, Themisto, Gueriu-MeueviUe, Ctjamus, Lamarck 

 (properly Latreille). He speaks of Themisto and Anonyx as peculiar to the zones in 

 question, but immediately after qualifies this statement. Lysianassa magellanica, he makes 

 the type of a new genus Euryteiies, which he thus defines : — 

 " Corporis forma crassa et rohisfa, epimeris magnis et p)edihus hrevihus. Antennse supieriores 

 flagello apperidicuJari preeditse, pedunculo crasso et ejus segmentis 2:do et Sdio hrevihus, 

 et flagelli segraento l:mo longo. Antennse inferiores segmento pedunculi l:mo magna et 

 inflate et extus visihili. MandibnJse. palpigerae acie Ixvi et tuberculo molari magno iiistructx, 

 Maxillse l:mi paris jjaJpo hiarticulato angusto, apice duas vel tres setas vel aculeos minores 

 mohiles gerente, et earum ramus interior latus et h-evis et setis multis ciliatis instrudus. 

 Maxillip)edum lamina trunci segmenti 2:di, sive lamina exterior margine interiore tenuissime 

 noduloso, et eorum palpns quadriarticulatus et unguiferus. Pedes tniiici sive thoracici 

 l:mi et 2:di paris suhcheliformes, illi validi et breves, ungue hene evoluto, hi longiorss et 

 graciliores, ungue minutissimo. Reliqui pedes trunci forma solita, rohusti. Laminx 

 hranchiales simpllces minimegue pectinatim plicatx. Pedes caudales ultimi paris ramis 

 lamellosis. Segmentum 7:mum sive idtimum caudx profunde hifidum, laciniis acuminatis 

 ad apieem vera non spiniferis. — Tantummodo una species : — Eurytenes 7nagellanicus 

 (H. Milne Edwards)." The definition inserted in the Swedish paper adds to the account of 

 the mandibuliE, " processu accessorio vero minimo et simplice," which in the English paper 

 appears in the description of the species. The species is now known as Eurytenes gryllus, 

 having been identified by Boeck with Gammarus gryllus, iVIandt, (rather Lichtenstein 

 in Maudt), 1822. A full and interesting account of the species is here given, with good 

 figures. Plates I., II., III., figs. 19-22. Lilljeborg agrees with Spence[Bate in numbering 

 the limb-joints, not from the first free joint, but from the true first joint, "to which the gill- 

 sack and lamina for covering the eggs are attached. 

 A tabular view of the families of the Amphipoda gives them in two groups ; those in which 

 "Pedum caudalium omnia paria adsunt- — Normdlia, S. Bate," are 1. Gammaridae, Dana. 

 2. Orchestidfe, Dana. 3. Corophidse, Dana. 4. Cheluridse, Allman. 5. Hyperidse, Dana. 

 Those in which "Pedum caudalium unum vel pluria paria absunt — Aberrantia, S. Bate," 

 are 6. Dulichidse, Dana. 7. Caprellidae, Dana. 8. Cyamidas, Dana. The Hyperidse are 

 distinguished from the four preceding families by having the " maxillipedes imperfect! et 

 palpo carentes." The Cheluridee are separated from the three preceding by having the 

 " Segmenta caudalia posteriora coalita ;" but since the establishment of the genus 

 Gopilana, Wrzesniowski, this character has lost some of its definiteness. 

 In a tabular view of the genera of the Gammaridae, Lilljeborg introduces Microplax as a new 

 name for Iduna, Boeck, Iduna being preoccupied, but Liljeborgia, Spence Bate, 1862, has 

 the priority. Odius is substituted for Otus preoccupied, and Calliopius for Calliope 



