7U Alil'lUl'OUA NOIlilALlA. 



gin : ultimate pair having the rami dissimihir, the o\iter one bi- 

 articulate, the first joint serrated posteriorly, the second clean ; 

 the inner ramus clean, dorsally serrated anteriorly. 

 Length ^-ths of an inch. 



Dredged in Plymouth Sound (C.S.B.). Colour, corneous yellow. 



11. Lysianassa longicomis. (Plate XI. fig. 2.) B.M. 



Lysianassa ? longicomis, Lucas, AIfj6rie, pi. . f. 2. 

 Lysianassa Chausica, SpenceBate, Synops. Brit. Amph., Ann. Nat. Hist. 

 Feb. 1857 (not Fxhcards). 



White, Hist. Brit. Crust, p. 168. 



Cephalon having the ocular processes produced to a point, rather 

 turned down, and half as long as the fii'st joint of the peduncle of 

 the superior antennae. Eyes reniform, black. Superior antennae 

 having the peduncle much longer than the flagellum ; complement- 

 ary appendage nearly as long as the flagellum. Inferior antennas 

 having the last joint of the peduncle longer than all the others, 

 and reaching to the extremity of the superior antenna ; the fla- 

 gellum is very long, longer than the entire animal, very slight, 

 and generally folded back beneath the body ; each joint is a little 

 longer than broad, and carries a calceola and two small hairs. 

 Epistome rounded, projecting. First pair of gnathopoda having 

 the carpus shorter than the propodos. Second paii- of gnathopoda 

 having the carpus longer than the propodos, tufted with short hairs 

 inferiorly and long hairs superiorly. Last three segments of the 

 pleon suddenly smaller ; posterior pair of pleopoda longer than the 

 preceding, fringed with plvunose hairs. 



Length about half an inch. 



Coloiu- orange, mottled with red. It is perhaps the most beautiful 



species of the genus. 



M. Lucas, to whom I have to express gi-eat obligation for allow- 

 ing me to examine specimens from his private collection of Aniphi- 

 poda, described this species from a specimen foiind on the coast of 

 Algiers, which appears to be identical with the British. The specimen 

 from which our figure is taken was dredged in Pl^nnouth Sound. 

 I have received a fragment of one from my valued correspondent 

 Mr. Edward, of Banff. 



12. Lysianassa ? Brasiliensis. (Plate XI. fig. 3.) 

 Lysianassa ? Brasiliensis, Dana, U.S. Explor. Exped. p. 914. pi. 62. f. 1. 



'* Body much compressed ; coxae very large. Eyes reniform. Supe- 

 rior antenna; short, less than a fourth of the body in length ; fla- 

 gellum twice as long as base, about ten-jointed, appendage seven- 



