Carl Bovallius, 



Vesiciikc hra?/rhia/cs pcdibus peroii affixae. 



Picon tri-articulatum. 



Urns tri-artic'ulatuni. 



Telson simplex vel leviter lissum. 



IV. Ampliipoda Ily peri idea. 



Caput cum scgincnto primo })ereii non coalitnm. 



Oriili saepissime grandes, maximam partem capitis occupantes. 



An f entire supcrioros flagello secundario carentes. 



Pedes maxiUares in unum coaliti, palpo carentes. 



Vesicidce branchiales pcdibus pereii afKixae. 



Pleon tri-articulatum. 



Urns bi- vel raro tri-articulatum. 



Telson simplex non fissuni. 



V. Amphipoda Caprellidea. 



Capnt cum scgmento primo pereii coalitum. 



Of-nli minuti. 



Antennce superiorcs flagello secundario carentes. 



Pedes maxiUarcs in unum coaliti, palpum unguiculatum gerentes. 



Vesiculce branchiales segmentis anticis pereii affixa;. 



Pleon et urns valde reducta. 



Telson nullum. 



AMPHIPODA SYNOPIDEA. 



Amphipods with the head free from the first pereional segment; 

 with large eyes, occupying almost the whole surface of the head; the 

 first pair of antennae provided with a secondary flagellum; the maxilli- 

 peds more or less coalesced, provided with four-jointed palps; pleon and 

 urus divided into three segments each; telson simple or partially cleft. 



With the true Gammarids the animals belonging to this tribe 

 have many characteristics in common, as the general form of the body, 

 the secondary flagellum of the first pair of antenna;, the struclure of 

 the maxillipeds and their palps etc. (The first family, S^niopidas, is the 

 most closely related to the Gammarids). Many characteristics point deci- 



