Ampiiipoda Synopidea. 33 



As I have not got any specimen at my disposal for examination, 

 the above quoted characteristics are extracted from the description of 

 Professor Sars (1. c); for further particuhirs I refer to his detailed de- 

 scription, mentioning hero only some few important facts. 



The eyes are without any trace of refractive elements or distinctly 

 developed pigment. 



The secondary flagellum of the first pair of antemue is about as 

 long as the first joint of the true flagellum; its first joint is the longest. 



The second pair of antennce are shorter and more slender than the 

 firgt, the flagellum is shorter than the peduncle. 



The femora of the last three pairs of pereiopoda are slender, not 

 lamelliform; the following part of the last pair is very elongate. 



The first two pairs of uropoda are long, slender, two-articulate. 

 This is a very peculiar form of uropoda, not occurring, as far as I know, 

 in the tribe of A m p h i p o d a H y p e r i i d e a. 



Lengtli. 11 m.m. 



Hah. The North Atlantic. 



);>One example of this remarkable Amphipod was taken, on the 

 first cruise of the Expedition, off the Norwegian coast (Stat. 54) ^) at a 

 depth of 600 fathoms. Another (defective) specimen Avas subsequently 

 extracted from the stomach of the remarkable deep-sea fish, Rhodich- 

 thys regina, Collett, brought up at Stat. 297'^), from a depth of 1280 

 fathoms.)^ (G. 0. Sars 1. c. p. 233). 



1) About Lot. 64" 54' North and Long, 3" 50' East from Greeinvicli 



2) About Lat. TfSO' North and Long. 5"30' East from Greenwich. 



Nova Acta Reg. Soc. So. Ups. Ser. III. 



