Lysianassa 39 



4. L. longicornis H. Luc. 1845/46 L. L, H. Lucas in: Expl. Algerie, An. 

 artic, v.l p. 53 Crust. t. 5 f . 2 | 1866 L. l. (part.), E.Grube in: Arch. Naturg., tJ.32i 

 p. 396 t. 9 f. 8 ((5) i 1866 L. l, Cam. Heller in: Denk. Ak. Wien, v. 26 ii p. 17 t. 2 

 f. 12— 15 I 1892 L. l, A.O.Walker in: Ann. nat. Hist., ser. 6 v.9 p. 135, 136 | 1867 

 Lysianassina l.'j-?L. filicornis, A.Costa in: Annuario Mus. Napoli, u4 p. 43 j 1893 

 Lysianax l, A. Della Valle in: F. Fl. Neapel, u 20 p. 790 t. 3 f. 6; t.25 f. 1—15 | ?1853 

 Lysianassa spinicornis, A.Costa in: Rend. Soc. Borbon., n. ser. v.2 p. 172 | ?1857 L. s., 

 A.Costa in: Mem. Acc. Napoli, vA p.l8ö 1. 1 f.4 | ?1857 L.loricata, A.Costa in: Mem. 

 Acc. Napoli, o.\ p. 186 1. 1 f . 5 | .?1862 L. filicornis, A. Costa in: Annuario Mus. Napoli, 

 v.l p. 80 t. 2 f. 18— 23 I ?1889 Lysianax ceratinus, A.O.Walker in: P. Liverp. biol. 

 Soc, v.S p. 200 t. 10 f. 1—8 I 1899 L. c, Chevreux in: C.-R. Ass. Franc, Sess. 27 

 f. 2 p.476. 



Head, lateral angles produced, rounded. Side-plates close set, deep, 

 1^^ a little widened distally. Pleon segment 3, postero-lateral angles rounded. 

 Eyes broadly reniform, red. Autenna 1, 1^* Joint with inner distal margin 

 produced into a spiniform process, varying from large to evanescent, 

 2^ Joint about half length of first, or more, 3*^ short, flagellum with 10 joints, 

 1^* not long, accessory flagellum with 3 — 5 joints. Antenna 2, ultimate Joint of 

 peduncle much longer than penultimate in d, flagellum in ö much longer 

 than body. Gnathopod 1, 5**^ Joint a little shorter than 6*^, 6*^ tapering, 

 7*^ small. Gnathopod 2, 6^^ Joint with distal bind margin prolonged into 

 a kind of lobe, rough with spinules. Peraeopod 3, 2<^ Joint elliptical, broader 

 than long. Peraeopod 4, 2*^ Joint with bind margin rather sinuous. Peraeo- 

 pod 5, 2^ Joint very broad, but longer than broad. üropods all with awl- 

 shaped rami, more or less armed with spines. Telson elliptical, apically 

 rounded. Colour grey dorsally. Side-plates rusty-yellow and greyish with 

 scattered little white spots. Flagella of antennae crimson. L. 8 — 10 mm. 



Mediterranean; North- Atlantic and North-Sea (Great Britain). 



5. L. einghalensis (Stebb.) 1897 Lysianax c., T. Stebbing in: Tr. Linn. Soc. 

 London, ser. 2 v.7 p. 28 t. 7 a. 



Head, lateral lobes produced, the apices rounded. Side-plates 1 and 

 4 distally much widened. Pleon segment 3, postero-lateral angles rounded. 

 Eyes very large and dark, meeting on the top of the head. Antenna 1, 

 1^* Joint tumid, 2^ and 3*^ not extremely short. flagellum with 6 joints, none 

 long, accessory flagellum with 3 joints. Antenna 2, as usual in d, flagellum 

 35-jointed, slender, reaching about to middle of pleon. Maxillipeds, inner 

 plates long, outer plates large but not reaching beyond 2*^ Joint of palp. Gnatho- 

 pod 1, 6*^ Joint slightly longer than 5*^^. Gnathopod 2, 3^^ Joint as long as 

 5th^ ßth i'ather more than half length of 5*^, subchelate, minute flnger 

 closing down on small transverse palm. Peraeopods 3 — 5, 2^ Joint broadly 

 expanded, produced below the 3"^ Joint. Uropod 3, peduncle elongate, rami 

 fringed with a few long setae. Telson much longer than broad, apically 

 rounded. L. about 8 mm. 



Indian Ocean (Trincomali [Ceylon]). Surface. 



6. L. variegata (Stimps.) 1855 Anonyx variegatus, Stimpson in: P. Ac. Philad., 

 r. 7 p. 394 1 1862 Lysianassa variegata, Bäte, Cat. Amphip. Brit. Mus., p. 67 t. 10 f . 7 | 

 1888 Lysianax variegatus, T. Stebbing in: Bep. Voy. Challenger, «.29 p. 682 t. 23. 



Head, lateral lobes produced, rounded. Side-plate 1 distally widened, 

 ■i^^ with lower expansion deep, not broad. Pleon segment 3, postero-lateral 

 angles forming a minute tooth far upturned. Eyes large, reniform, very 

 dark in spirit. Antenna 1, 1^* Joint tumid, 2"^ much longer than 3*^, flagellum 



