5ö6 Hyale 



Neapel, u 20 p. 519 t.2 f. 6; 1. 16 f. 23— 42 | 1843 Amphithoe p., A. nilssonii, H. Eathke 

 in: N. Acta Ac. Leop., r. 20i p. 81 t. 4 f. 5a — e; p. 264 | 1861 Allor ehestes n., Bäte & 

 Westwood, Brit. sess. Crust., v.l p. 40 f. | 1876 Hyale nilssoni, T. Stebbing in: Ann. 

 nat. Hist., ser. 4 v. 17 p. 337 t. 18 f. la— h | 1890 H. »., U. 0. Sars, Crust. Norway, v. 1 

 p. 26 t. 11 f . 1 I 1887 H. nilsoni (part.) -)- H. n. var. minor, Chevreux in: Bull. Soc. 

 zool. France, t\12 p.293, 294 | 1888 H. n. -f- -ff- n. var. major, Che^Teux in: Bull. Soc. zool. 

 France, v. 13 p. 32 | 1893 H. n., Chevreux & E. L. Bouvier in: Ann. Sei. nat., ser. 7 v. 15 

 p. 111 I 1845 Orchestia nidrosiensis, Kroj'er in: Naturh. Tidsskr., ser. 2 v.l p. 299 | 1857 

 AHorchestes danai, Bäte in: Ann. nat. Hist., ser. 2 v. 19 p. 136. 



Back smooth. Side-plates with lower margin smooth, side-plate 1 widened 

 below. Pleon segment 3, postero-lateral corners obtusely quadrate. Eyes 

 small, round, black; (large, oval in var. major). Antenna 1 in 9 nearly 

 as long as antenna 2, flagellum 6-jointed, in d flagellum sometimes with 

 10 joiuts, reaching considerably beyond peduncle of antenna 2. Antenna 2 

 in Ö, flagellum 15-jointed. Gnathopod 1 in d, 5^^ Joint distally sorae- 

 what widened, not produced along bind raargin of 6**», 6^^ oblong, bind 

 margin with spinules from the base to a submedian spine, palm slightly oblique, 

 rouuded off. Gnathopod 2 in d, 7**» Joint robust, broadest proximally, front 

 margin very convex, bind margin with various spinules but no conspicuous 

 notch, palm rather oblique, somewhat sinuous, well defined, tinger closing 

 between two rows of spines to the terminal cavity of the palm, which is 

 armed with minute spines. Gnathopod 1 in nearly as in Ö. Gnathopod 2 

 in 9 like gnathopod 1, but rather larger, 5*^ Joint more expanded distally. 

 Peraeopods 1 — 5 with numerous spines and setae, but none of exceptional 

 size, the 6*^ Joint having besides others an apical and a subapical one minutely 

 hooked at tip and opposable to the stroug curved finger, Peraeopods 3—5, 

 2^ Joint expanded with smooth bind margin. Peraeopods 4 and 5, 6*-^ Joint 

 with group of setae and spine at middle of bind margiu. Uropods 1 and 2, 

 rami short, with marginal and strong apical spines. üropod 3 small, ramus 

 much shorter than peduncle, Telson divided into 2 obtuse lobes with 

 their surfaces adjacent. Colour green with metallic lustre. L. 6 — 8 mm 

 (almost double in var. majoi'). 



North- Atlantic and adjoiniug seas (Europe; Azores). In sea-weed between the 

 high-water marks respectively of neap- and spring-tides ; var. major at low-tide. 



12. H. grandicornis (Kreyer) 1845 Orchestia g., 0. longicornis, Kreyer in: 

 Naturh. Tidsskr., ser. 2 v.l p.292; 1. 1 f. 2a-n | 1851 AUorchestes g., F. Brandt in: 

 Bull, phys.-math. Ac. St.-Petersb., v.9 p. 142 | 1888 Hyale g., T. Stebbing in: ßep. Voy. 

 Challenger, «;.29 p.210 | 1849 Nicea lucasii, H. Nicolet in: Gay, Hist. Chile, v.3 p. 238; 

 Crust. t.2 f. 7 I 1852 AUorchestes verticillata -f- A. peruviana, J. D. Dana in: P. Amer. Ac, 

 V.2 p.205, 206 I 1862 A.verticillatus, A. verticellatus. Bäte, Cat. Amphip. Brit. Mus., p. 43 

 t. 7 f. 1 I 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, ».20 p. 519. 



Side-plate 1 somewhat produced forward, front margin faintly concave, 

 angle broadly rounded (in Nicolet's figure subacute). Pleon segment 3, 

 postero-lateral corners quadrate, but not acutely so. Eyes rather large, dark, 

 subrotund, sometimes approximate at top of the head. Antenna 1 about ^5 

 as long as body, more than half as long as antenna 2, joints of peduncle 

 successively shorter, flagellum much longer than peduncle, 12-jointed. An- 

 tenna 2 about V3 ^s long as body, with small but discernible gland-cone, 

 ultimate Joint of peduncle a little longer than penultimate, flagellum longer 

 than peduncle, longer and stouter than flagellum of antenna 1, but some- 

 times with only 12 joints. Upper lip, distal margin almost straight truncate, 

 with rounded corners. Maxillipeds, 4*^ Joint of palp a slender pointed 

 setuliferous finger. Gnathopod 1 in d, 2"* jeint narrow at base, thence to 



