NATURAL HISTORY. Ixxxvii 



vers la queue ; la cinquieme paire tres-longue dirigee vers la bouche, ayant I'avant- 

 dernier article grele, fort long, garni d'epines en dedans et termine par un crochet ; 

 les quatre derniers, de moitie plus courts, dirigcs et conformes de meme, mais sans 

 dents a I'avant-demier article. Queue terminee par six appendices natatoires longs, 

 aplatis, bifides a Textremite ; trois paires de filets egalement natatoires sous les trois 

 premiers segmens de la queue." 



It is most nearly allied to Hypcria of Latreille and Phrosina of Risso,* but differs 

 from the former in the great length of the fifth pair of legs, and in the inferior antennae 

 being longer than the superior ; ,and from Phrosina, in the greater length of the 

 antennae, and in the head not being prolonged inferiorly en rostre. 



It is a singular circumstance in the history of this animal, that it has hitherto been 

 found only in the vicinity of the Falkland Islands, and near the west coast of 

 the peninsula of Boothia. 



9.— GAMMARUS NUGAX. 



GAMMARUS NUGAX.— Sa6 ; Supp. to Parry's 1st Voyage—^, ccxxix.^ 



TALITRUS NUGAX. — Ross, App. to Parry's 3d Voyage— p. 119; and Polar Voyage—^. 205. 



CANCER NVGAX.— App. to Phipps's Voyage— ■p. 192, pi. 12, fig. 3. 



By reason of the small superadded setse on the upper antenna of the Cancer Nugax 

 {Phipps), I have referred it to the genus Gammarus, although it does not participate in 

 all the characters assigned to that genus by Latreille. The lower antennae being 

 longer than the upper, it belongs to Lamarck's genus Talitrus. This last character, 

 together with the second pair of feet, being elongate, and terminated by a flattened 

 setose articulation, without a claw, render the establishment of a new genus necessary 

 for its proper arrangement. 



It is a very numerous inhabitant of the Arctic Seas. 



• CuTier Rfegne Animal — vol.iv., p. 117. 



