Amphipoda Synopidea. 3 



dedly to the Hyperids, as the structure and development of the 63^68, 

 the structure of the mouth-organs (with the exception of the palps of 

 the maxillipeds), the form of the uropoda and the telson (especially in 

 the last two families) a. 0. 



Probably the new genus Hyperiopsis^ lately described by G. 0. 

 Sars '), is to be placed in this tribe as the type of a new family, Hy- 

 pe riopsidse, and I shall preliminarily do so here, although I do not 

 know much about the very important characteristics of the mouth-or- 

 gans, because Saks only mentions, that the mandibles are provided with 

 palps, similar to those of the Gammarids. 



Thus the tribe can conveniently be divided into three families: 



1. SYNOPID^. 2. TRISCHIZOSTOMATID^ and 3. HYPERIOPSID^. 



bifid. Synopidœ. 



The seventh pair of pereiopoda 



not transformed. Telson 



simple. Trischizostoinatidse. 



transformed. Telson simple. Hyperiopsidœ. 



The first family. 

 SYNOPIDiE. 



1880. Subfamily Synopiadœ. R. KOSSMANN. 



Syn. 1852. Subfamily Sijnopimv. DANA. United States Exploring Expedi- 



tion. Crustacea, vol. 2, p. 981. Fol. 

 1863. Subfamily iSynopiades. SPENCE BATE. Catalogue of the specimens of Am- 



phipodous Crustacea in the col- 

 lection of the British Museum, 

 p. 341. 



Zoologische Ergebnisse einer im 

 Auftrage der k. Académie der Wis- 

 senschaften zu Berlin ausgeführ- 

 ten Reise in die Küstengebiete des 

 Rothen Meeres. Malacostraca. p. 

 137. Leipzig. 4:to. 



Diagn. The head i.s triangular, not tumid. 



The eyes occupy the upper mecliau part of the head, aud are distinctly faceted. 

 The mandibles are well developed, with a three-jointed jjalp. 



1) The Norwegian North Atlantic Expedition. Zoology. Crustacea. I, p. 231. Chri- 

 stiania. 1885. Fol. 



