562 Hyale 



Body at centre moderately, behind very strongly compressed, in the 

 last % having a carina gradually encreasing in strength, peraeon segments 

 6 and 7 each with small dorsal tooth, pleon segments 1 — 4 each with a strong 

 one. Side-plates 1 — 5 rather large. Pleon segment 3, postero-lateral corners 

 seemingly obtusely quadrate. Eyes rather small, almost reniform, black, 

 Antenna 1 very little shorter than antenna 2, which are about half as long 

 as body, both antennae sparingly armed, with flagellum longer than peduncle. 

 Gnathopod 1, 5**^ Joint short, distally wider than G^^, 6^^ elongate oval, palm 

 oblique, ill-defined, finger bent. Gnathopod 2, 5*^ Joint distally narrower 

 than 6*^, 6*^ somewhat similar in shape to that of gnathopod 1 but much. 

 larger, elongate-rhomboidal. Peraeopod 3, 2^ Joint rather small, almost 

 circular. Peraeopod 4, 2*^ Joint rounded quadrate. Peraeopod 5, 2"^ Joint with 

 expansion large, rounded behind, below produced into a triangulär lobe. Uropod 3, 

 ramus nan-ow, spinöse, as long as peduncle. Telson with a spinule ou each of 

 the Short, rounded rhomboidal, apically thickened lobes. L. reaching 29 mm. 



Sea of Ochotsk. 



3. H. eampbellica (Filh.) 1885 Allorchestes c, Filhol in: Kecu. Passage Venus, 

 v.Sn Zool. p.466. 



Eyes small, round. Antenna 1 reaching base of flagellum of antenna 2, 

 which is a little longer than the body. Gnathopod 1, 6*^ and 6*^ joint& 

 equal in length. Gnathopod 2, 6*^1 Joint robust, oval, a little compressed 

 laterally, finger hooked, the part of the band to which it is applied showing 

 on the inner face a series of minute denticulations ; 5*^ Joint without produced 

 process („spine"). Peraeopods 3 — 5 have very fine setae at the apices of 

 their joiuts; bind margin of 4*^ Joint denticulate. L. 8 mm. 



South-Pacific (shore of Perseverance Bay [Campbell Island]). 



4. H. diplodactyla Stebb. 1899 H. diplodactylus, T. Stebbing in: Tr. Linn. 

 See. London, ser. 2 17. 7 p. 403 t. 31 C. 



Side-plates 1 and 2 not very deep, 1^* little widened below. Eyes 

 rounded, light-coloured in spirit. Antenna 1 much longer than peduncle 

 of antenna 2, peduncle short, its joints successively much shorter, flagellum 

 in ö 14-, in Q 9-jointed. Antenna 2, ultimate Joint of peduncle longer 



than penultimate, flagellum in ö 26-, in 9 

 17-jointed. Gnathopod 1 in d (Fig. 95), 2^ Joint 

 Short, distal part wide, 4*^ distally squared, 

 supporting fringed bind lobe of ö*'^, this lobe 

 joiot projecting beyond a short straight piece of the 



'if- 6'i> Joint bind margin, 6*^ Joint widening greatly to the 



palm, bind margin sinuous, much shorter than 

 smoothly curved front, palm long, not very 

 Fig. 95. H. diplodactyla, (?. oblique, cxcavatc, ending in a wide pocket, which 



°^° ■ receives the deeply furcate end of finger, which 



is thus wider distally than at its base. Gnathopod 2 in d scarcely differing 

 from that of H. galateae, except that the expanded front margin of the 

 2* Joint is closely fringed with setules, and the 6^^ is widest near to the 

 base instead of at junction of bind margin with the long very oblique 

 palm. In other respects 9 and ö appear to agree with H. galateae. 

 Telson rather markedly upturned, with a slight twist to the rounded apex 

 of each triangulär lobe. L. about 5 mm. 



Caribbean Sea (St. Croix). 



