Tryphosa 69 



i Pleon Segment 3, i)ostero-lateral corners not acute 



) Ol- upturned 1. T. insignis . . . p. 69 



I Pleon Segment 3, postero- lateral corners acutely 



l upturned 2. T. kergueleni . p. 69 



J Telson tapering little 3. T. trigonica . . p. 70 



I Telson tapering much 4. T. pusilla . . . p. 70 



f Pleon segment 4 not carinate 5. T. sarsi . . . . p. 70 



\ Pleon segment 4 carinate — • 6. 



f Head with lateral angles acute 6. T. angrüata . . p. 70 



I Head with lateral angles rounded — 7. 



j Gnathopod 2, 6th Joint broader than 5th 7. T. compiessa . p. 71 



) Gnathopod 2, 6tli Joint not broader than 5th — 8. 



j Pleon segment 4 with rounded carina 8. T. nanoides . . p. 71 



\ Pleon segment 4, carina angularly produced at apex 9. T. haringii . . . p. 71 



1. T. insignis Bonnier 1896 T. i., J. Bonnier in: Ann. Univ. Lyon, ».26 p.619 

 t. 36 f. 1. 



Head, lateral corners produced to a right-angled lobe with straight 

 sides. Side-plate 1 scarcely naiTOwed at rounded distal end, 4*1^ large, much 

 produced backward. Pleon segment 3, postero-lateral corners produced backward 

 in narrowly rounded lobe, segment 4 not dorsally elevated. Eyes wanting. 

 Antenna 1 in young d, flagellum of 7 joints, 1^^ as long as the peduncle's short 2*^ 

 and 3<^ joints combined, the other 6 joints small, without calceoli, accessory 

 flagellum 3-jointed. Antenna 2 scarcely longer than antenna 1, flagellum with 

 7 small joints. Epistome not projecting in front of upper lip. Gnathopod 1 slender, 

 5*^ and 6**^ joints equal, palm small, defined by 2 spinules, finger bifid. Gnatho- 

 pod 2 scarcely longer, 5*^ Joint considerably longer than 6*^. Peraeopod 3, 

 2"^ Joint nearly as broad as long, smaller than the side-plate. Peraeopod 4, 2*^ Joint 

 oblong oval, rest of limb more elongate than in peraeopods 3 and 5. Peraeo- 

 pod 5, 2*^ Joint very large, rest of limb small. Uropod 3, 2-jointed outer ramus 

 with 1 seta on outer margin. inner ramus quite unarmed. Telson deeply 

 cleft, with 2 pairs of marginal and 1 of apical spines. L. 6 mm. 



Bay of Biscay. Depth 950 m. 



2. T. kergueleni (Miers) 1875 Lysianassa Je., 3Iiers in: Ann. nat. Hist., ser. 4 

 r. 16 p. 74 I 1879 Anonyx k., Miers in: Phil. Tr., u 168 p. 207 1. 11 f. 4 | 1888 Hippo- 

 medon k., T. Stebbing in: ßep. Voy. Challenger, u29 p.623 t.8 | 1893 H. hoMlli (part.), 

 A. Della Valle in : F. Fl. Neapel, v. 20 p. 808. 



Head, lateral angles acutely produced. Side-plate 1 not narrowed 

 below. Pleon segment 3, postero-lateral angles upturned, the process long, 

 narrow, acute, segment 4 not apically elevated. Eyes doubtful. Antenna 1, 

 1^* Joint broad and long, flagellum with 14 joints, 1^* not very long, accessoiy 

 flagellum 5-jointed. Antenna 2, ultimate Joint of peduncle a little shorter than 

 penultimate, flagellum 16-jointed. Maxiila 1, with 12 spine-teeth on apex 

 of palp. Maxillipeds, with spine-teeth on inner margin of outer plates. Gnatho- 

 pod, 1, 6*^^ Joint very little shorter than 5*^, rather naiTOW, of uniform width, palm 

 oblique. Gnathopod 2, 6^^ Joint long ovate. üropod 3, inner ramus longer 

 than basal Joint of outer. Telson nearly twice as long as broad, cleft extending 

 more than three fourths of length, not dehiscent, with 3 pairs of marginal 

 spinules and a pair in the emarginate apices. L. lOmm. 



Southern Indian Ücean (Kerguelen Island). Depth 37 m. 



