AMPHIPODA. 



NATATORIA. 



APPENDIX. 



503 



LYSIANASSIDES. 



( Vol. I. p. 118.**) 



OPTS QUADRIMANA, N.S. 



Specific character. Upper antenuaj with the secondary appendage nearly 

 reaching to the extremity of the flagelhim. First pair of gnathoi)oda with 

 the propodos quadrate, truncated at the end, the inferior angle aimed with a 

 strong pointed spine. 



Length, one-eighth of an inch. 



This species differs from the preceding in having the 

 superior antennae longer, and furnished with a secondary 

 appendage that reaches nearly to the extremity of the flagel- 

 lum ; the inferior antennae being scarcely longer than the 

 superior, and in the first pair of gnathopoda being much 

 more robust than the second. The propodos of the first pair 

 is quadrate, the palm being at right angles with the anterior 

 and posterior margins, and armed with a minutely denticu- 

 lated thickened margin ; inferior angle produced to a short 

 strong tooth, against which the apex of the slightly curved 

 dactylos impinges. 



This species was sent to us by Mr. Edward, who took it off 

 the Banffshire coast. 



