jyLy researches on the rekitions of the différent forms of Amphipoda 

 Hyperiidea to one another and to the other Amphipoda have induced me 

 to establish a new tribe of Amphipoda, intermediate between the Gam- 

 maridea and the Hyperiidea. I propose to name it Amphipoda Syno- 

 pidea. In my opinion the Amphipoda thus ought to be divided into 

 five tribes, with the following diagnoses: 



1. Amphipoda Tanaidea. 



Caput cum segmente primo pereii coalitum. 



Oculi minuti in lobis discretis siti, vel nuUi. 



Antennce superiores flagello secundario instrnctse vel destitutse. 



Pedes maxillwes in unum coaliti, palpnm qiiattuor-articulatum gerentes. 



LamincB hranchiales pedibus maxillaribus affixse. 



Pleon sœpe quinque-articulatum. 



Urus maximiun. 



Telson nullum. 



II. Amphipoda Oammaridea. 



Caput cimi segmento primo pereii non coalitum. 



Oculi médiocres, sessiles. 



Antennce superiores flagello secundario ssepissime instrnctse. 



Pedes maxillares non coaliti, palpum quattuor-articulatum gerentes. 



VesiculcB branchiales pedibus pereii affixse. 



Picon tri-articulatum. 



Urus mediocre, tri-articulatum. 



Telson sœpissime fissum. 



III. Amphipoda Synopidea. 



Caput cum segmento primo pereii non coalitum. 

 Oculi grandes, maximam partem capitis occupantes, sessiles. 

 Antennce superiores flagello secundario iustructse, 



Pedes maxillares plus minnsve coaliti, palpum quattuor-articulatum gerentes. 

 Nova Acta Reg. Soc. Sc. ups. Ser. III. 1 



