354 Rhachotroi^is, Rozinante 



peduncle, accessory flagellura 2-jointed, nearly as loDg as' 1^* Joint of 

 flagellum. Antenua 2 in adult 6 longer than the whole body, ultimate 

 Joint of peduncle longer than penultimate, both elongate. Upper lip, apex 

 produced, naiTOwly rounded. Maxilla 1, inner plate with 1 seta, outer with 

 9 spines. Maxillipeds with elongate palp. Gnathopods 1 and 2 as in K. inflata 

 (p. 351), with which also peraeopods 1^5 appear nearly to agree, but in peraeo- 

 pod 5 the 5*^ Joint is rather longer than the 6*^ instead of the reverse. Uropod 3, 

 rami foliaceous, rather blunt. Telson nearly reaching extremity of uropod 3, 

 tapering but slightly, ending in a very small triangulär emargination. L. 

 about 10 mm. 



Bay of Biscay. Depth 950 m. 



6. Gen. Rozinante Stebb. 



1871 Tritropis (pari), A. Boeck in: Forh. Selsk. Christian., 1870 p. 158 | 1894 

 Rozinante (Sp. typ.: B. fragilis), T. Stebbing in: Bijdr. Dierk., v.ll p. 38 | 1899 B.. 

 T. Scott in: J. Linn. Soc, v. 27 p. 77. 



Front part of pleon carinate. Head minutely rostrate. Side-plates 

 small, 1^* narrowly produced foiivard. Pleon segment 3, postero-lateral margins 

 denticulate. x4ntennae 1 and 2 sexually varying in length. Antenna 1 shorter 

 than antenna 2, without accessory- flagellum. Upper lip slightly emarginate. 

 Mandible, cutting edge dentale, accessory plate on both mandibles, many 

 spines in spine-row, molar prominent, 3^ Joint of palp not longer than 2'^. 

 Maxilla 1, inner plate with 4 setae, outer with 11 spines, 2'^ Joint of palp distally 

 widened, fringed with numerous spines. Maxilla 2, plates moderately long. 

 Maxillipeds, inner and outer plates moderately long, linger of palp attached 

 below the abruptly narrow^ed apex of 3'^ Joint. Gnathopods 1 and 2 subchelate, 

 5*11 Joint elongate, unlobed, 6^^ narrow, finger short. Peraeopods 1 — 5 slender, 

 5*^ the longest. Uropod 3 reaching much beyond the others, rami long, 

 lanceolate, subequal, spinulose. Telson short, partially cleffc. 



1 species. 



1. R. fragilis (Goes) 1866 Paramphithoe f., Goes in: Öfv. Ak. Förh., v.22 p.524 

 t. 39 f. 16 I 1871 Tritropis f., A. Boeck in: Forh. Selsk. Christian., 1870 p. 160 | 1874 

 T. f., Buchholz in: Zweite D. Is^ordpolarf., v. 2 p. 320 Crust. t. 3 f . 1 | 1876 T. f., 

 A. Boeck, Skand: Arkt. Amphip., v.2 p.515 | 1888 Ehachotropis f., T. Stebbing in: Rep. 

 Voy. Challenger, v.29 p. 356 \ 1894 Bozinantef., T. Stebbing in: Bijdr. Dierk., v. 17 p.39 [ 

 1899 B.f., T. Scott in: J. Linn. Soc, r. 27 p. 77 | 1893 Fontogeneia aculeata (part.)?, 

 A. Della Valle in: F. Fl. Neapel, v.20 p.617. 



Pleon Segments 1 — 3 obtusely tricarinate, carinae not produced into 

 dorsal teeth, but notched at end of lateral keels. Head, lateral corners 

 slightly produced, obtuse, post-antennal corners very acutely produced, 

 with serrate upper margin. Side-plates 5 — 7 serrate on bind margin. Pleon 

 segment 2, postero-lateral corners a little acutely produced, segment 3 

 rotundo-quadrate, postero-lateral margins of segments 1 — 3 finely serrate 

 (or strongly, Buchholz). Eyes large, subglobose or subreniform, black. Antenna 1, 

 1^* Joint longer than 2^ and 3*^ combined, all with apical teeth, 2^ Joint 

 only sometimes longer than 3*^, flagellum thrice as long as peduncle, of 

 many short joints. Antenna 2, ultimate Joint of peduncle as long as apically 

 dentale penultimate, flagellum much longer than peduncle. Gnathopods 1 

 and 2, 5*^ Joint as long as or rather longer than 6*^, widened a little distally. 



