4 Carl Bovallius, 



The maxiUipeds, coalesced at the base, carry strong four-jointed palps. 



The antennœ are fixed on the under-side of the head. The second pair are 



like those of the Garaniarids. 

 The seventh pair of pereiopoda are not transformed. 

 The uropoda are like those of the Gammarids. 

 The telson is cleft to the middle. 



The animals belonging to this family resemble the true Gammarids 

 in more points than those of the two following families do and are very 

 interesting as connecting links. Dana') placed them among the Hype- 

 rids as the third subfamily of the family Hyperidge; Spence Bate^) 

 removed them from this family and ranged them as the first subfamily 

 of the family Oxycephalidœ. Claus mentions the genus 1871') as belon- 

 ging to the Gammarids. Kossmann*) regarded them as Hyperids and 

 described some particulars of their morphology, overlooked by Dana. 

 Other authoi's have totally omitted the animals, which seem to be very 

 rare and easily passed over, being very small and, as is has been men- 

 tioned above, very similar in general habitus to Gammarids. 



Genus 1. Synopia. DANA, 1852. 



Syn. 1853. Synopia. DANA. United States Exploring Expedition Cru- 



stacea, vol. 2, p. 994. Folio. '; 



1863. ,, ,, Spence Bate. Catalogue of the specimens of Araphipod- 



ous Crustacea in the collection of the 

 British Museum, p. 341. 



1880. „ „ R. KossMANN. Zoologische Ergebnisse einer im Auftrage 



der k. Académie der Wissenschaften zu 

 Berlin ausgeführten Rei.se in die Küsten- 

 gebiete des Rothen Meeres. Maiaoostraca. 

 p. 137. Leipzig. 4:to. 



1) United States Exploring Expedition. Crustacea, vol. 2, p. 981. 



2) Catalogue of the specimens of Amphipodous Crustacea in the collection of 

 the British Museum, p. 341. 



,3) »Untersuchungen über den Bau und die Verwandtschaft der Hyperiden", in 

 Nachrichten von der Königl. Gesellschaft der Wissenschaften und der G. A. Universität zu 

 Göttingen, 1871, N;o 5. p. 157. 



4) Zoologische Ergebnisse einer im Auftrage der königlichen Académie der Wissen- 

 schaften zu Berlin ausgeführten Reise in die Küstengebiete des Rothen Meeres. Mala- 

 costraca. p. 137. 



