Allorchestes, Aoridae 585 



A. littoralis Stimps. 1853 A. l., Stimpson in: Smithson. Contr., v.d ur. 5 p. 49 

 t. 3 f. 36 I 1873 Hyale l, (S. 1. Smith in:) A. E. Verrill in: Rep. U. S. Fish Comm., v.l 

 p. 556 I 1893 H.prevostü (pari.), A. Della Valle in; F. Fl. Neapel, u20 p. 519. 



L. 8—10 mm. 



North-Atlantic (America from Massachusetts Eay to Grand Mauan). Among 

 fucus, etc. and in tide-pools. 



A. patagonicus R. O. Cunningh. 1871 A.j}-, R- ü. Cunningham in: Tr. Linn. 

 Soc. London, v.21 p-498 t. 59 f. 14 | 1888 Hyalella sp.?, T. Stebbing in: Rep. Voy. 

 Challenger, u 29 p. 404 | 1893 jff. sp.?, A. Della Valle in: F. Fl. Neapel, d.20 p. 514. 



No description; perhaps a species of Hyalella (p. 574). 



Strait of Magellan, Sandy Point. In a freshwater stream. 



A. paulensis Heller 1865 A. p., Cam. Heller in: Reise Novara, u2iii Crust. 

 p. 128 1. 11 f. 4 j 1888 Hyale sp.?, T. Stebbing in: Rep. Voy. Challenger, v.2% p. 383 1 

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



L. 12 mm. 



Southern Indian Ocean? (St. Paul). 



A. penicillatus Stimps. 1855 A. penicillata, Stimpson in: P. Ac. Philad., v.l 

 p. 383 j 1893 Hyale prevostii (part.). A. Della Valle in: F. Fl. Neapel, u20 p. 288, 519. 



Antenna 2 with fascicles of long setae. L. 6 mm. 



Sea of Japan. 



A. plumulosus Stimps. 1857 A. p., Stimpson in: Boston J. nat. Hist., uft 

 p. 519 1 1893 Hyale prevostii (part.), A. Della Valle in: F. Fl. Neapel, u 20 p. 519. 



Antenna 2 with fascicles of plumose setae. L. 10 mm. 

 San Francisco Bay. Gravelly shores in the littoral zone. 



A. rubrieornis Stimps. 1855 A.r., Stimpson in: P. Ac. Philad., v.l p. 383 | 

 1879 Hyale (A.)r., Wrzesniowski in: Zool. Anz., v.2 p. 200 | 1893 Hyale sp.?, A. Della 

 Valle in: F. Fl. Neapel, v.20 p. 529. 



L. 16 mm. 



Sea of Japan. 



A. sayi Bäte 1862 A. s., Bäte, Cat. Amphip. Brit. Mus., p. 39 t. 6 f. 5 ] 1893 

 Pocheerus falcatus (part.)?, A. Della Valle in: F. Fl. Neapel, t;. 20 p. 453. 

 L. 9 mm. 

 North- America. 



A. stylifer Grube 1866 X s., E.Grube in: Arch. Naturg., u32i p. 386 t. 9 

 f. 4 I 1893 Hyale prevostii (part.), A. Della Valle in : F. Fl. Neapel, v. 20 p. 520. 



Gnathopod 2 in (5, 5*^ Joint very sKort, distally produced to a curved stiliform 

 process between 4th and 6th. L. 5 mm. 

 Adriatic. Under stones on beach. 



A. sp., Heller 1866 Nicea nilsoni (err., non Amphithoe nilssonii H. Rathke 1843!), 

 Cam. Heller in: Denk. Ak. Wien, v.2ßu p. 4. 



L. (5 5 — 6 mm. 

 Adriatic. 



33. Farn. Aoridae 



1899 Aoridae, T. Stebbing in: Ann. nat. Hist., ser. 7 f. 4 p. 211. 



Head, lateral lobes little produced. Side-plates of very moderate depth, 

 4*^ with bind margin not excavate. Antenna 1 the longer, with 3'^ Joint 



