Talorchestia r>49 



border with a deep median notch, the tinger well developed (Haswell); 

 gnathopod 1 in o simply unguiculate (Thomson). Gnathopod 2 in Q , 

 5^^» and 6*^' joiuts subequal, 6^^ produced some way beyond the minute, 

 obliquely placed finger. Telson triangulär, blunt. L. 6-13 mm. 



South-Pacific (Tasmania). Under stones in estuaries. 



10. T. megalophthalma (Bäte) ^1844 Talitrus quadrifidus, De Kay. Zool. 

 N.-York, i. 6 p. 36 t. 14 f. 27 | 18i7 Orchestia megalophthalnius (Scamballa in. Leach in 

 MS.) (nom. nud.), A. AVhite, Crust. Erit. Mus., p. 86 | 1851 0. megalophthalmos (nom. nud.), 

 F. Brandt in : Bull, phys.-math. Ac. St.-Petersb., v.9 p. 142 - 1862 0. megalophthalma, Bäte, 

 Cat. Amphip. Brit. MÜs., p. 22 t. 3 f. 8 | 1893 0. m., A. Della Valle in : F. Fl. Neapel, 

 i?. 20 p.496 t. 57 f. 54 | 1873 Talorchestia vi., (S.I.Smith in:) A. E. Verrill in: Kep. 

 V. S. Fish Comm., r. 1 p. 556. 



Very near to T. longicornis, but back still broader. eyes far larger, 

 these being of exceptional size and only separated by half their width 

 or less, anteuua 2 shorter (?), and 6*^ Joint of gnathopod 2 in the ö with 

 long palm, scarcely oblique, gnathopod 2 in the o with 4^^ Joint strongly 

 produced at lower bind angle ; uropod 3, ramus less strongly spined. L. 19 mm. 



North-Atlantic (from Cape Cod to Xew Jersey [North America]). 



11. T. longicornis (Say) 1818 Talitrus l, Say in: J. Ac. Philad., ein p.384 ] 

 1830 Orchestia l, H. Milne Edwards in: Ann. Sei. nat., V20 p. 361 | 1844 0. l, De Kay, 

 Zool. N.-York, u6 p.35 t. 9 f. 28, 28a 1 1847 0. l. (Scamballa l. Leach in MS.), A. White, 

 Crust. Brit. 3Ius.. p. 86 | 1862 0. l, Bäte. Cat. Amphip. Brit. Mus., p. 18 t. 3 f. 1 ' 1893 

 O.l, A. Della Valle in: F. Fl. Neapel, r. 20 p. 505 t. 57 f. 66, 67 ] 1851 O.I., Megal- 

 orchestes?, Megalorchestia? l., F. Brandt in: Bull, phj's.-math. Ac. St.-Petersb., r.9 p. 142, 

 312 ! 1873 Talorchestia l, (S. I. Smith in :) A. E.Verrill in : Rep. U. S. Fish Comm., r. 1 p. 556. 



Back broad. Side-plate 1 little produced, narrow, as deep as the 2*^, which 

 is slightly emarginate behind, 5**^ not so deep as 4**^ but broader. Pleon 

 Segment 3. postero-lateral corners quadrate. Eyes oval, narrowed above. or 

 irregularly rounded, about as far apart as their smaller diameter, dark. An- 

 tenna 1. peduncle about reaching end of penultimate Joint of peduncle of 

 antenna 2, 2*^ Joint of peduncle rather longer than 1^* or 3*^, fiagellum 

 Short, 6-jointed. Antenna 2, ultimate Joint of peduncle more than twice as 

 long as penultimate, flagellum in a o specimen nearly as long as peduncle, 

 22-iointed. Maxillipeds with no unguiculate terminal Joint. Gnathopod 1 

 in d, 5^^ Joint with subapical pellucid process outward, 6*^ much shorter 

 and narrower, oblong, with slight distal widening into a pellucid process, 

 tinger with smooth inner margin, a little overlapping palm. Gnathopod 2 

 in cS", 2*^ Joint abruptly widened from narrow base, 3*^ larger than 4*^ or 5*'^ 

 6*^^ massive, widening to the palm, which is only a little oblique, detined by 

 a ven- blunt tooth, between which and the hinge is a convex swelling of the 

 palm. or a considerably concavity (in ö specimen 25 rnm long, Bäte) or a large 

 rounded tooth between 2 cavities (Milne-Edwards). Gnathopod 1 in Q , o*'» 

 and 6^'' joints with out the pellucid processes. 6*^1 naiTOwing to the finger- 

 hinge, being there little wider than base of finger. Gnathopod 2 in o , 

 2*^ Joint broadly and iiTegularly oval, membranaceous, 4^^ quadrate. not 

 produced, 5^*^ a little longer than 6^^, free part of bind margin very convex, 

 6*^ elongate, produced much beyond the minute chela-forming finger. 

 Peraeopod 2, finger ratlier slender, deeply notched. Other peraeopods rauch 

 as in T. quoyana (p. 547). üropod 1, rami equal. Uropod 2, outer ramus 

 the shorter. üropod 3, ramus longer than peduncle. Telson obtusely triangulär, 

 slightly emarginate, with spinules at the 2 points thus fonned; a transversa 



