572 Hyale 



22. H. rubra (G. M. Thoms.) 1879 Nicea r., G. 31. Thomson in: Tr. N. Zealand 

 Inst., nll p. 236 t. 10b f. 3 | 1886 N. r., G. M. Thomson & Chilton in: Tr. N. Zealand 

 Inst., t;. 18 p. 144 | 1888 Hyale r., T. Stebbing in: Rep. Voy. Challenger, v.29 p. 500 j 

 1893 H.prevostü (part.), A. Della Valle in: F. Fl. Neapel, t?.20 p. 520. 



Side-plates 1 — 4 rather deep. Pleon segment 3, postero-lateral corners 

 a little outdrawn, acute. Eyes iiTegularly rounded. Autenna 1 half as long as 

 antenna 2, peduncie very short, flagellum with 22 joints in d, fewer in 9 , with 

 sensory tilaments in both. Autenna 2 half as long as body or more, ultimate 

 Joint of peduncie rather longer than penultimate, flagellum thrice as long a& 

 peduncie, with 40 — 60 joints or more in (5, with 36 in 9. Gnathopod 1 

 in ö, 5**1 Joint with well rounded lobe of bind margin, 6*^ oblong with 

 slightly convex margins, palm little oblique, finger slightly overlapping. 

 Gnathopod 2 in d, 6^^ Joint very large, broadly oval, bind margin well 

 developed, palm oblique, finger thick at base (Thomson: with 2 tubercles 

 at the Joint), closing tightly between 2 rows of spinules. Gnathopods 1 and 2 

 in 9 alike, 6*^ Joint rather longer in gnathopod 2, oblong, front margin 

 slightly convex, bind margin with 1 small notch, palm a little oblique, 

 scarcely or little overlapped by finger. Peraeopods 1 — 5, spines on inner 

 margin of 6*^ Joint apically serrulate, encreasing in size to the antepenultimate, 

 thence diminishing, setule on finger small. Peraeopods 4 and 5 decidedly 

 longer than the preceding peraeopods, 2*^ Joint in peraeopod 5 broadly ex- 

 panded, the rounded bind margin crenulate. Uropods 1 — 3 and telson of 

 the usual character. üropods 1 and 2 with lateral spines on both rami. 

 Colour pink. L. 8 — 9 mm. 



South-Pacific (New Zealand). 



H. babirussa (A. Costa) 1857 Amphithoe b., A. Costa in: Mem. Acc. Napoli, 

 V. 1 p. 201 t. 2 f. 5 I 1862 Allorchestes babiais {\a])s., corr. : babirussa), Bäte, Cat. Amphip. 

 Brit. Mus., p. 50 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, v.20 p. 519. 



Bay of Naples. 



H. buechichi (Heller) 1866 JVicea b., Cam. Heller in: Denk. Ak. Wien, «;. 26u 

 p. 7 1. 1 f. 13— 15 I 1888 Hyale b., T. Stebbing in: Rep. Voy. Challenger, ».29 p. 366, 

 1705 I 1893 H. prevostii (part.), A. Della Valle in: F. Fl. Neapel, ».20 p. 519. 



Maxillipeds, 4tli Joint of palp very short, thickened at the base. L. $ 7, (5 8 mm. 



Adriatic (Lesina). 



H. gazella (A. Costa) 1857 Amphithoe g., A. Costa in: Mem. Acc. Napoli, v.l 

 p.202 t.2 f. 6 a— e | 1862 Allwchestes g., Bäte, Cat. Amphip. Brit. Mus., p. 50 | 1893 

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



Bay of Naples. 



H. georgiana (Pfeff.) 1888 Allorchestes georgianus, Pfefifer in: Jahrb. Hamburg. 

 Anst., V. 5 p. 77 t. 1 f. la— n, 4 | 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. 

 Neapel, v. 20 p. 520. 



Probably identical with H. hirtipalma (p. 564). L. about 16 mm. 



South-Atlautic (South Georgia). At low-tide, under stones. 



H. gracilis (Dana) 1852 Allorchestes g., J. D. Dana in: P. Amer. Ac, v.2 p.205 | 

 1853 & 55 A.g., J.D.Dana in: U. S. expl. Exp., ?;. 13n p. 889; t. 60 f. 5 a— d j 1893 

 Hyale prevostii (part.), A. Della Valle in : F. Fl. Neapel, v. 20 p. 519. 



Gnathopod 2, 4tli joint very acutely produced behind the small 5th. L. 12 — 16 mm. 



Trepical Pacific (Tongatabu). Shallow water among sea-weeds. 



