Orchestia, Talorchestia 



543 



O. OChotensis F. Brandt 1851 0. o., F. Brandt in: Bull, phys.-math. Ac. 

 St.-Petersb., r. 9 p. 140 | 1851 0. o., F.Brandt in: Middendorff, Reise Sibirien, ü. 2i 

 p. 74 t. 6 f. 18—26 I 1862 0. o., Bäte, Cat. Amphip. Brit. Mus., p. 369 t. la f. 9 j 1893 

 0. gamma reUus (part.), A. DellaValle in: F. Fl. Neapel, t?. 20 p. 499. 



L. 12 mm. 



Sea of Ochotsk. 



O. rectimana Dana 1852 0. r., J. D. Dana in: P. Amer. Ac, v.2 p.203 | 1853 

 & 55 0. tahitensis, J. D. Dana in: U. S. expl. Exp., v. 13 ii p. 877; t. 59 f. 5a— g | 1862 

 0. t., Bäte, Cat. Amphip. Brit. Mus., p. 33 t. 5 f. 8. 



Perhaps a species af Talorchestia. L. $ 6 — 8 mm. 



Tahiti. In damp places at 457 m above sea-level. 



5. Gen. Talorchestia Dana 



1847 ScambaUa (part.), (Leach in MS.) A. White, Crust. Brit. Mus., p. 86 | 1852 

 Subgen. Talorchestia, J.D.Dana in: Amer. J. Sei., ser. 2 ».14 p. 310 j 1853 Subgen. 

 T., J. D. Dana in: U. S. expl. Exp., ul3ii p. 851 ] 1857 T., 

 Batein: ATin. nat. Hist., scr.2 f. 19 p. 135 | 1888 T., T. Stebbing 

 in: ßep. Voy. Challenger, ».29 p. 257, 262 | 1891 T., T. Stebbing 

 in : Ann. nat. Hist., ser. 6 ». 8 p. 328 1 1893 T., Chevreux in: Bull. Soc. 

 zool. France, u 18 p. 127 1 1885 Talorchestes, Thalorchestia, Filhol 

 in: Recu. Passage Venus, v. 3n Zool. p. 459, 461; Planches p. 28. 



Like Orchestia (p.530), except that gnathopod 1 in o 

 (Fig. 94) is simple, instead of subchelate. Peraeopod 2 

 usually has the inner margin of the finger more shai-ply T.novaehoUandiae,?. 

 constricted than in allied genera. Gnathopod i. 



Sea-shores, widely distributed, generally in sand. 

 19 accepted and 2 doubtful species. 



Synopsis of accepted species: 



{Gnathopod 2 in (5, palm defined by tooth or 

 process — 2. 

 Gnathopod 2 in cJ, palm without defining 

 tooth or process — 12. 



/ Peraeopod 5, 2d Joint exceptionally expanded 

 J Pe 



ded — 3. 



2 \ Peraeopod 5, 2d Joint not exceptionally expan- 



1. T. scutigerula . . . . p. 544 



{Gnathopod 2 in (5 having a very deep palmar 

 cavity — 4. 

 Gnathopod 2 in (5 not ha\ing a very deep 

 palmar cavity — 5. 



(Gnathopod 2 in (J, defining tooth of palm 

 immensely long 2. T. dar"wimi p. 545 

 Gnathopod 2 in (J, defining tooth of palm 

 not immensely long 3. T. deshayesii . . . . p. 545 



{Gnathopod 2 in (J, palm defined by 2 teeth — 6. 

 Gnathopod 2 in c?, palm defined by a single 

 tooth — 7. 



(Gnathopod 2 in cj, palm with a tooth in 

 addition to the defining teeth 4. T. tridentata . . . . p. 546 

 Gnathopod 2 in cJ, palm without tooth ad- 

 ditional to the defining teeth 5. T. pravidactyla . . . p. 546 



