Lysianassidae, Kerguelenia 11 



I 3Iandible, palp attached not behind the 



36 J molar — 37. 



l 31andible, palp attached behind the molar — 46. 



( Gnathopodl, fiuger minute, shrouded among 



37 { setae 36. Gen. Scopelocheirus . . p. 61 



l Gnathopod 1, finger not concealed — • 38. 



j Gnathopod 1 simple 37. Gen. Alicella p. 63 



\ Gnathopod 1 »ot simple — 39. 



j Gnathopod 1 imperfectly subchelate — 40. 

 \ Gnathopod 1 distinctly subchelate — 4L 



f Side-plates 1 — 4 closely packed 38. Gen. Uristes p. 63 



I Side-plates 1 — 4 not closely packed . . . 39. Gen. Centroraedon . . . p. 65 



f Gnathopod 1, 6tli joint distally widened . 40. Gen. Cheirimedon . . . p. 66 

 ( Gnathopod 1, 6tli Joint not distally widened — 42. 



I Gnathopod 1, 6tli Joint much loiiger than Sth 41. Gen. Tryphosella . . . p. 67 

 42 { Gnathopod 1, 6th joint not much longer 

 ( than 5th — 43. 



, 31axilla 2, inner plate not much shorter than 



) outer 42. Gen. Tryphosa . . . . p. 68 



j Maxiila 2, inner plate much shorter than 



^ outer — 44. * 



\ Epistome not projecting 43. Gen. Chironesimus . . . p. 72 



\ Epistome projecting — 45. 



j Uropod 3, rami foliaceous 44. Gen. Eurythenes . . . . p. 72 



\ Uropod 3, rami lanceolate 45. Gen. Tmetonyx . . . . p. 73 k4— 



j Epistome with spiniform projection . . . 46. Gen. Tryphosites . . . p. 77 

 \ Epistome without spiniform projection — 47. 



f Antenna 1 (Fig. 12), Ist joint carinate, 



produced 47. Gen. Lepidepecrevun . . p. 78 



47 



I AB 



duced — 48. 



\ Antenna 1, Ist joint not carinate, not pro- 



j Body robust, epistome sometimes projecting*) 48. Gen. Orchomenella . . p. 81 

 I Body slender, epistome not projecting*) . 49. Gen. Orchomenopsis . . p. 83 



1. Gen. Kerguelenia Stebb. 



1888 Kerguelenia (Sp. un.: K. compacta), T. Stebbing in: Rep. Voy. Challenger, 

 «?.29 p. 1219 I 1891 K., G. 0. Sars, Crust. Norway, v. 1 p. 119. 



Side-plates, especially 4*^ large and deep. Antenna 1 short in both 

 sexes, with a dense brush only in d; antenna 2 more slender and scarcely 

 longer than antenna 1. Mandible without cutting edge, spine-row, or molar; 

 palp slender, apical (Fig. 2). Maxillae 1 and 2 normal, but very small. 

 Maxillipeds with both plates small; palp elongate. Gnathopods 1 and 2 slender, 

 elongate; 3*^ joint long, 7**^ minute; gnathopod 1 simple, gnathopod 2 chelate. 

 2^ Joint broad in peraeopods 4 and 5, not in peraeopod 3; 4^^ joint broad in 

 peraeopods 3 — 5. Uropod 3 very small; rami rudimentary. Telson small, 

 rounded, entire. 



2 species. 



**) No distinguishing feature between those two genera seems to be absolutely constant. 



