68 Tryphosella, Tryphosa 



attached just over molar. Maxilla 1, inner plate 



with 2 setae, outer with 11 spines on slightly. 



decuiTent apex. Maxilla 2, outer plate rather longer 



than inner. Maxillipeds, inner plates normal, outer 



fuUy reaching- end of 2'^ Joint of palp, Mnged on 



inner margin with stout spine-teeth, 2^ Joint of palp 



not longer than 1^*. Gnathopod 1 setose, subchelate, 



3*^ Joint not longer than 4^^, 6*^ much longer than 



o^\ oblong, palm transverse. Gnathopod 2 (Fig. 11) 



minutely chelate, 6*^ Joint less than half as long as 



5*^ Peraeopods 3 — 5, 2*^ Joint large. Peraeopod 4 



6'h johlt longer than peraeopod 5. üropod 3, inner ramus 



Fig. 11. T. barbatipes. as long as basal joiut of outer. Telsoü cleft be3"ond 



Gnathopod 2. thc centrc. 



1 species. 



1. T. barbatipes (Stebb.) 1888 Tryphosa h., T. Stebbing in: ßep. Voy. 

 Challenger, ».29 p. 621 t. 7 | 1890 T. h., Orchomenella?, G. 0. Sars, Crust. Xorway, v.l 

 p.66 I 1893 Änonyxb., A. DellaValle in: F. Fl. Neapel, ».20 p.814 | 1893 Tryphosella b., 

 J. Bonnier in: Bull. sei. France Belgique, ».24 p. 171, 195. 



Head, lateral corners much produced, acute. Side-plate 1 narrowed 

 below, 5*11 as broad as deep. Pleon segment 3, postero-lateral angles slightly 

 rounded. Antenna 1 in 9 , flagellum with 8 joints, 1^* large and equal to 4-jointed 

 accessoiy flagellum. Antenna 2 in 9 , ultimate and penultimate joints of peduncle 

 subequal, flagellum about 7-jointed. Peraeopods, 4*^ Joint only little widened. 

 Telson oblong oval, cleft for % of its length. L. 9 9 mm. 



Southern Indian Ocean (Kerguelen Island). Depth 228 m. 



42. Gen. Tryphosa Boeck 



?1849 Stenia, J.D.Dana in: Amer. J. Sei., ser. 2 v.8 p. 136 | 1871 Tryphosa 

 (part.), A. Boeck in: Forh. Selsk. Christian., 1870 p. 117 | 1876 T. (part.), A. Boeck, 

 Skand. Arkt. Amphip., ».2 p. 180 j 1891 & 95 T., G. 0. Sars, Crust. Norway, ». 1 p. 75; 

 p. 683, 684 I 1893 Tryphosella (part.), Typhosa (laps.), J. Bonnier in: Bull. sei. France 

 Belgique, v. 24 p. 170. 



Side-plate 1 usually naiTOwed below. Accessory flagellum of antenna 1 

 well developed. Antenna 2 in d scarcely half the length of the body. Epistome 

 usually projecting in front of upper lip, rounded. Mandible, molar denticulate, 

 prominent, palp attached just over it, with 1^* Joint short, 2*^ elongate. 

 Maxilla 1, inner plate short with 2 setae, outer obliquely trancate with 

 crowded spines. Maxilla 2, outer plate a little longer than inner. Maxillipeds 

 normal, outer plates reaching beyond 2^^ Joint of palp, the margin crenulate. 

 Gnathopod 1 slender, subchelate, 6^^ Joint scarcely as long as b^^, both 

 naiTow. Gnathopod 2 subchelate, 6*^ Joint rather stout, more than half as 

 long as 5*^ Peraeopods 3 — 5, 2*^ Joint large, rest of limb slender. Uropod 3, 

 inner ramus at least as long as basal Joint of outer. Telson oblong oval, 

 deeply cleft. 



9 species. 



Synopsis of species: 



Eyes wanting — 2. 



Eyes present — 5. 



Pleon segment 4 not dorsally elevated — 3. 



Pleon segment 4 dorsally elevated — 4. 



