12 Kerguelenia, Trischizostoma 



Synopsis of species: 



Gnathopod 1, 7th Joint curved; peraeopod 3, 2d joint 



not lobed 1. K. compacta . p. 12 



Gnathopod 1, 7tli joint straight; peraeopod 3, 2d Joint 



lobed below 2. K. borealis . . p. 12 



1. K. compacta Stebb. 1888 K. c, T. Stebbing in: üep. V"oy. Challenger, 

 n29 p. 1220 t. 15 a. 



Body compact. Side-plates 1 — 4 deep, 4*^ gi-eatly excavate bebiiid 

 for the 5*^. Pleon segment 3 with postero-lateral aiigies almost quadrate. 

 Eyes doubtful. Antenna 1 in Q , 1^* joint stout, flagellum 

 5 joints, accessory flagellum 8 joints. Antenna 2, last 

 3 joints of peduncle nearly equal, flagellum 4 or 5 joints. 

 Gnathopod 1, S*^ joint louger than 4*^, as long as 5*^; 

 6^'* naiTOW, tapering; 7*^ small, with 2 setules, one as 

 long as the joint and plumose, projecting fi-om its 

 concave margin. Gnathopod 2 longer than gnathopod 1, 

 3^ Joint not quite so long as 5^^; 5*^ much longer than 

 6*^, both of them setose ; the chela minute. Peraeopods 1 

 and 2 with 4^^ joint a little widened. Peraeopod 3, 

 2^ Joint not or scarcely expanded, 4*^ much wider than 

 the 3^ or 5*^, quite overlapping the latter behind; the 

 6*11 rather longer, not broader, than the !i^^. Peraeo- 

 pods 4 and 5 with very wideiy expanded 2^ Joint, 

 ^^^' ^'M?nSie^^°** otherwise resembling peraeopod 3, but while 2*^ joint in 

 peraeopod 5 is much larger than in peraeopod 4, the 

 rest of the limb is smaller. üropod 1 longer than uropod 2. Colour in 

 spirit light brown. L. about 4 mm. 



Cumberland Bay [Kerguelen Island]. Depth 230 m. 



2. K. boreaUs 0. Sars 1891 K. b., G. O. Sars, Crust. Xorway, v. l p. 119 t. 40 f. 2. 



Perhaps identical with K. compacta. Eyes ti'iangular, imperfect. reddish 

 with white border. Antenna 1 in o , flagellum 7-jointed, accessory flagellum 

 4 joints. Antenna 1 in (5, having last 2 joints of peduncle and base of flagellum 

 more swollen and provided with dense brush of setae. Antenna 2. flagellum 

 7 joints. Gnathopod 1, 7*^ joint continuous with tapering 6^\ and provided 

 with a sti-ong secondary booth and 2 slender setae. Peraeopod 3, 2<^ joint 

 expanded below into a lobe, üropod 3 exti'emely small, rami much smaller 

 than peduncle, the outer the smaller. Telson enclosed between the lateral 

 parts of the preceding segments; its tip obtusely truncated. Colour bright 

 orange. L. 9 5 mm. 



Arctic Ocean (Finmark, Nordland), Hardangerfjord Depth 190 — 280 m. 



2. Gen. Trischizostoma Boeck 



1853 Guerinia (Sp. un. : Gr. nicaeensis) (non Robineau-Desvoidy 1830, Diptera!), 

 (Hope in MS.) A. Costa, Descr. 3 Crost. dal Hope, p. 3 ; 1853 G., A. Costa, Fauna 

 Reg. Napoli, fasc. Ajir. 1853 p. 1 | 1861 Trischizostoma (Sp. un. : T. raschii), A. Boeck 

 in: Forh. Skand. Xaturf., Mede 8 p. 637 \ 1886 T., Bovallius in: N. Acta Soc. Upsal, 

 ser. 3 ».13 nr. 9 p. 23 j 1888 T., T. Stebbing in: Rep. Voy. Challenger, v. 29 p. xix, 

 .272, 1673, etc. | 1890 T., G. 0. Sars, Crust. Xorway, v. 1 p. 29 j 1895 T., T. Stebbing 

 in: Xat. Sei., v.G p. 265 | 1893 Guerina -^ T., A. Della Valle in: F. Fl. Neapel, ».20 

 p. 775, 779. 



