570 Hyale 



3 cleft spiiies. üropods 1 and 2 rather short. üropod 3, ramus as long as 

 peduncle. Telson cleft to base, lobes tiiangular. L. 6—12 mm. 



Atlantic (Rio Janeiro, harbour; Virgin Island St. Thomas; Cape Verde Islands; 

 Tierra del Fuego?). 



18. H. perieri (fl. Luc.) 1846 Orchestia p., H.Lucas in: Expl. Algerie, p. 52 

 t. 5 f. 1 I ?1866 Allorchestes p., E. Grube in: Arch. Naturg., t'.32i p. 382 t. 9 f . 2 | 1862 

 A. pereiri (p&rt.), Bäte, Cat. Amphip. Brit. Mus., p. 42 t. 6 f. 10 | 1866 Nicea macronyx, 

 Cam. Heller in: Denk. Ak. Wien, i-.26n p.9 1. 1 f.21— 24 | 1879 Hyale m., Wrzesniowski 

 in: Zool. Anz., v.2 p. 202 | 1868 Nice^ perieri -\- N.p. var. pontica (non Hyale j)ontica 

 H. Rathke 1837!) -{- N. perieri var. brevicornis, Czeniiavski in: SyezdaKuss. Est., Syezda 

 1 Zool. p. 116 t. 8 f. 26, 27 | 1875 N. prevostii (part.), Catta in: Key. Sei. nat., vA p. 166 j 

 1893 Hyak p. (part.), A. Della Valle in: F. Fl. Neapel, u. 20 p. 519. 



Eyes oval, or reniform, black, nearly meeting at top. Antenna 1 reaching 

 a little beyond peduncle of antenna 2, flagellura with 10 or 11 joints, all 

 cylindric, longer than broad. Antenna 2 half as long as body, almost 

 «ompletely unarmed, flagellum considerably longer than peduncle, with 16 

 or 17 cylindric joints, the proximal short, the following longer. Maxillipeds, 

 3*^ Joint of palp feebly setose over base of finger, more strongly on inner 

 side. Gnathopod 1. 5*^^ Joint rather shorter than 6*^ 6**^ oblong, bind margin 

 with setose submedian notch, palm almost ti'ansverse, finger slightly curved, 

 slender, acute. Gnathopod 2 in d, 4**^ Joint rather acutely produced to touch 

 the 6**1; 6*^ large, almost piriform, the oblique, setulose palm passing gradually 

 without Interruption iuto the shorter bind margin (Heller' s description, but in 

 Heller's figure palm well defined by a cavity and 2 palmar spines; also 

 well defined in Lucas' figure); finger well curved, its point closing against 

 the inner surface. Gnathopod 2 in 9 , 5^^ Joint forming a long and thin 

 process between 4*^ and 6^^ joints, 6*** more of an oval, with shorter palm. 

 Peraeopods 3 — 5 slender, 6*^ Joint rather long, almost straight, finger strong, 

 apically bent, the inner setule conspicuous. Colour duU yellow. L. 9 5 — 8, 

 ö 6 — 15 mm. 



Mediterranean, Adriatic. Black Sea, tropical Atlantic (Virgin Island St. Thomas). 



19. H. camptonyx (Heller) 1866 Nicea c, Cam. Heller in: Denk. Ak. Wien, 

 «.26n p. 10 1. 1 f. 25— 30 j 1879 Hyale c, Wrzeäniowski in : Zool. Anz., v.2 p.202 \ 1893 

 H. prevostii (part.), A. Della Valle in: F. Fi. Neapel, t?. 20 p. 519. 



Back rounded. Side-plates 1 — 4 moderately large, 1^* slightly widened 

 ■distally, 2*^ Square. Pleon segment 3, postero-lateral corners quadrate with 

 small produced point f]yes small, subrotund, wider than the diameter apart. 

 Antenna 1 reaching beyond middle of flagellum of antenna 2, peduncle 

 Short, 1^* Joint as long as 2^ and 3*^ combined, flagellum long, 12 — 16-jointed. 

 Antenna 2 half as long as body, ultimate Joint of peduncle longer than 

 penultimate, flagellum with 25 — 26 joints, the earlier short, the distal longer. 

 In young from mother's pouch antenna 1 with flagellum of 3 joints, much 

 ahorter than antenna 2 with 5-jointed flagellum. Maxillipeds, 4*^ Joint of 

 palp as long as 3*, with apical seta in d longer than the Joint. Gnatho- 

 pod 1 in (5, 2"* Joint rather broad except proximally, 5*^^ shorter than 6***, 

 distal lobe fringed with spines, 6*^ oblong, slightly wider at base, front 

 margin convex, bind straight, with group of spinules at centre, finger over- 

 lapping convex, oblique, ill-defined palm. Gnathopod 2 in d, 2^ Joint with 

 distal half of front expanded, 3"^ forming a small lobe, 4*^ and 5**» very 

 Short, 6**^ large, oblong oval, widest near base, palm spinöse, soraewhat 

 oblique, defined by a blunt tooth or an abruptly transverse space from the 

 straight bind margin, finger entering pocket at end of palm. Gnathopod 1 



