S7i Hyale, Hyalella 



H. seminuda (Stimps.) 1857 AUorchestes s., Stimpson in: P. Calif. Ac, v.l 

 p. 90 I 1857 A. s., Stimpson in: Boston J. nat. Hist.. r. 6 p. 518 | 1893 Hyale prevostU 

 (part.)?, A. Della Valle in: F. Fi. Neapel, t).20 p. 529. 



Bay of San Francisco. Littoral zone. 



H. stebbingi Chevreux 1888 H. 8., Chevreux in: Bull. Soc. zool. France, u 13 

 p.32 I 1888 E. s., T. Barrois, Cat. Crust. A^ores, p. 33. 



Probably a small variety of H. prevostii (p. 565). L. (J 5 mm. 



North-Atlantic (Azores). 



H. Stewart! (Filh.) 18S5 AUorchestes s., Filholin: Bull. Soc. philom., ser.7 v.9 

 p. 54 j 1885 A. s., Filhol in: ßecu. Passage Venus, v.Su Zool. p. 465 t. 53 f. 5. 



L. (5 17 mm. 



Paterson Inlet (Stewart Island by New Zealand). 



H. Stolzmani Wrzesn. 1879 H. s., Wrzeöniowski in: Zool. Anz., v.2 p. 201 I 

 1893 H.pontica (part.)?, A. Della Valle in: F. Fl. Neapel, u 20 p. 529. 



L. ? 7, (3 9 mm. 



Bay of Chimbote [Peru]. Under stones in small tidal pools. 



H. tenella (A. Costa) 1857 Amphithoe t., A. Costa in: Mem. Acc. Napoli, v. 1 

 p.204 t.2 f.8 I 1893flt/aiei>onfica(part.)?,A. Della Valle in: F. Fl. Neapel, u 20 p. 526. 



L. 5 mm. 



Bay of Naples. 



H. villosa S. I. Sm. 1876 H. v., (S. I. Smith in:) Kidder in: Bull. U. S. Mus., 

 V. 3 p. 58. 



Closely allied to H. hirtipalma (p. 564), but gnathopod 1 with 6tli Joint not 

 widening to the palm. L. nearly 10 mm. 



Southern Indian Ocean (Kerguelen Island). Kocky beaches. 



H. sp., (Hasw.) 1879 AUorchestes longicornis (non Orchestia l. Kreyer 1845!), 

 Haswell in: P. Linn. Soc. N. S.Wales, v.4 p. 251 t. 7 f. 4 | 1885 A. l, Haswell in: 

 P. Linn. Soc. N. S. Wales, v. 10 p. 95 t. 10 f. 6—8 | 1893, A. Della Valle in: F. Fl. Neapel, 



V. 20 p. 528. 



Closely agreeing with H. camptonyx (p. 570). L. about 10 mm. 

 South-Pacific (Kiama [New South Wales]). Between tide-marks. 



12. Gen. Hyalella S. I. Sm. 



1874 Hyalella (Sp. un.: H. dentata), S. I. Smith in: Rep. ü. S. Fish Comm., v.2 

 p.645 I 1888 H., T. Stebbing in: Rep. Voy. Challenger, 17.29 p. 172, 433 | 1893 JJ., A. 

 Della Valle in: F. Fl. Neapel, v.20 p. 512 ] ?1877 Lockingtonia (Sp. un.: L. fluvialis), 

 Harford in: P. Caüf. Ac, v.7 p. 53. 



Like Hyale (p. 559), except that maxilla 1 has a smaller palp, not 

 reaching base of apical spines of outer plate, gnathopod 2 in d (Fig. 97 

 p. 580) has the 5*^ Joint produced behind between the 4**^ and 6**^, and 

 the telson (Fig. 98 p. 580) is entire. 



Fresh water; in depths of lakes down to 120 m, and at heights above sea-level 

 extending to 4053 m. 



15 species. 



Synopsis of the species: 



f With dorsal teeth — 2. 

 \ Without dorsal teeth — 7. 



