Talorchestia 5-15 



overliipping. Guathopod 2 iu d, 5*^ Joint extremely small, 6*'' massive, 

 palm well detined. almost transverse, with a ti'iangular tooth very near the 

 tinger-hinge, or in the form described by Dana rather near the centi'e, finger 

 well arched, inner margin slightly projecting where it meets the palmar 

 process. Guathopod 1 in o . 6*^ Joint too rauch narrowed distally tu make the 

 limb subchelate. Guathopod 2 in o , 6*^^ Joint nearly as long as o^^, pro- 

 duced beyond the small tinger. Peraeopod 2 with the usual notch in the 

 tinger. Peraeopod 3, 2'^ Joint rather squarely rounded. Peraeopod 4, 2^ Joint 

 similar to that of peraeopod 3 but larger. Peraeopod 5 longer and stouter than 

 peraeopod 4, 2^^ Joint with elliptic shield-like hinder expansion produced above 

 the side-plates and also downward, but much narrower in g than in ö. Telson 

 not longer than broad, ü-shaped. Colour gTeeuish brown. L. 18 — 21 mm. 



Nassau ßay (Tierra del Fuego), among cast up sea-weed; South-Atlantic (Herniit 

 Island; Falkland Islands). 



2. T. darwinii (Fr. Müll.) 1864 Orchestia d., Fritz Müller, Für Darwin, p. 16 

 f. 7—9 i 1893 0. deshayesii (part.), A. Della Valle in : F. Fl. Neapel, v. 20 p. 507. 



unknown. — ö. Side-plate 1 is very small, side-plate 2 much 

 larger than any of the others. Eyes rounded, black. Antenna 1 very small, 

 not reaching middle of penultimate Joint of peduncle of antenna 2; antenna 2, 

 ultimateand penultimate jointsof peduncle equal, flagellum subequal to peduncle, 

 13-jointed. Guathopod 1, 5*^ and 6**' joints apically dilated, finger shorter 

 than apex of 6*^ Joint; guathopod 2, 3'^ Joint lobed in front, 5*'' very small, 

 ßth ygj.y large, in younger ö having the palm almost chelately produced 

 with bilobed ending, the bluut finger with strong median lobe, the apex 

 slightly overlapping palm, in eider ö the bind margin produced into a long 

 tooth slightly beyond finger-hinge, from which it is separated by a deep and 

 Wide triangulär cavity, the finger broad and straight with a blunt sort of 

 hook overlapping end of above-mentioned tooth. Peraeopods 3 and 4, 2*^ Joint 

 narrow, peraeopod 5 longer than the preceding peraeopods, with much broader 

 2'' Joint, other joints slender. L.? (Description based on MüUer's drawiugs.) 



Brazil. Near the shore, under leaves, düng, and the loose earth thrown up 

 by bnrrowing crabs. 



3. T. deshayesii (Aud.) 1826 Orchestia d., Audouin in : Descr. Egypte, v. 1 iv p. 93 

 Crust. t. 11 f. 8 I 1847 0. d. {Scamballa hiMiana Leach in MS.), A. White, Crust. Brit. 

 3Ius., p.86 i 1866 O.d., ('am. Heller in: Denk. Ak. AVien, ?;.26n p.3 t.l f.5, 6 | 1868 Od., 

 Czerniavski in: SyezdaRuss. Est., SyezdalZool. p. 131 t. 8 f. 52, 53 ; 1887 O.d., T.ßarrois, 

 Note Orchesties, "p. 6 f. | 1893 0. d. (part.), A. Della Valle in: F. Fl. Neapel, u20 p.507 

 t. 2 f.5; 1. 15 f. 15— 30; t. 57 f. 70— 73 | 1893 Talorchestia d., Chevreux in: Bull. Soc. 

 zool. France, v. 18 p. 127 f. | 1899 T. d., T. Stebbing in : Tr. Linn. Soc. London, ser. 2 

 V.7 p. 400 t. 30a i 1848 Orchestia gryphus, Friedr. 3Iüller in: Arch. Naturg., ». 14i p. 57, 

 62 t.4 f. 18, 28 I 1888 O.g., T. Stebbing in: Eep.Voy. Challenger, v.29 p.226, 421. 



Back moderately broad, peraeon segment 1 longer than 2*^. Side-plates 

 shallow, P* less deep and narrower than the following 4; 5^*> in front about 

 as deep as 4*^. Pleon segment 3, postero-lateral corners sharply quadrate. 

 Eyes rounded, dark. often wider apart than theii* width. Antenna 1 some- 

 times not reaching end of penultimate Joint of peduncle of antenna 2, 2*^ 

 Joint subequal to 1^*, flagellum shorter than peduncle, 5- or 6-jointed. An- 

 tenna 2 very variable, ultimate Joint of peduncle sometimes 2^j„_ times as 

 long as penultimate, flagellum shorter than peduncle, with about 20 joints, 

 most of them can-ying calceoli (Barrois). Maxillipeds, palp with arudiment 

 of 4^'» Joint (Della Valle). Guathopod 1 in d, h^^ Joint at apex of bind 



Das Tierreich. 21. Lief.: T. R. R. Stebbing, Amphipoda I. 35 



