550 Talorchestia 



plate only partiallj free aud not reaching the apex is truncate with small 

 median slit. Colour pale greyish, or sand-coloured. L. reaching 25 mm 

 and over. 



North- Atlantic (from Cape Cod to New Jersey [North America]). Burrowing in sand. 



12. T. poUicifera (Stimps.) 1855 Orchestia p., Stimpson in: P. Ac. Philad., 

 r. 7 p. 383 1 1857 0. jj., Stimpson in: Boston J. nat. Hist., v.ß p. 517 | 1862 Talorchestia 

 p., Bäte, Oat. Amphip. Brit. Mus., p. 16 ] 1893 Orchestia gammarellus (pari.)?, A. Della 

 Valle in: F. Fl. Neapel, n 20 p. 510. 



Eyes rather small, round, black. Antenna ] in 9 reaching end of 

 penultimate Joint of peduncle of antenna 2. Antenna 2 in d stout, peduncle 

 twice as long as flagellum. Antenna 2 in Q slender, flagellum 12-jointed. 

 Gnathopod 1 in (5, pellucid process in Joint 6 rather unusually produced. 

 Gnathopod 2 in d, 6*^* Joint ovate, of moderate size. Gnathopod 1 in 9 simple. 

 Gnathopod 2 in o with small hands, having a minute lateral finger. Caudal 

 stylets (uropod 3?) short, rami subconical. Colour pale brownish. L. 15 mm. 



North-Pacific (Loo Choo). 



13. T. tumida G. M. Thoms. 1885 T. t., G. M. Thomson in: N. Zealand J. Sei., 

 V.2 p. 577 I 1887 T. t, T. Stebbing iu: Tr. zool. Soc. London, v.\2\i p. 202 t. 39 f . A I 

 1888 T.t., G.M.Thomson in: Tr. N. Zealand Inst., u 21 p. 260 1. 13 f. 4— 8 | 1898 

 Orchestia t. (part.), G.M.Thomson in: Tr. N. Zealand Inst., n 31 p. 203 | 1893 O.gam- 

 marellus (part.), A. Della Valle in: F. PL Neapel, n 20 p. 501. 



Back broad. Side-plate 1 almost concealed by the broader side-plate 2, 

 4*^ the widest, irregularly quadrate, deeper than 5*^ Pleon segment 3, 

 postero-lateral corners quadrate. Eyes large, round, less than their own 

 width apai-t, turquoise-blue. Antenna 1 a little overlapping penultimate Joint 

 of peduncle of antenna 2, all 3 joints of peduncle very short, flagellum 

 shorter than peduncle, 7- or S-jointed in d, 5-jointed in Q. Antenna 2 

 less than 7$ as long as body, ultimate Joint of peduncle about twice as 

 long as the short penultimate, flagellum a little shoi*ter than penultimate, 

 12 — 15-joiuted in d, 12-jointed in 9. Upper lip distally broadly rounded. 

 Maxiila 1, palp barely perceptible. Gnathopod 1 m d, b^'^ Joint considerably 

 longer than 6^\ bind margin siibdistally forming a small linear lobe, 6*^^ 

 Joint oblong, with squarish distal lobe, little produced outward, and over- 

 lapped by the finger. Gnathopod 2 in d", 3*^ Joint longer than the quadrate 

 4^^i or the small cup-shaped 5*^^ 6*^^ massive, palm oblique, very spinulose, 

 with 2 deep excavations between which a stout process meets a strong 

 projection of finger's , inner margin; in young ö the palm and finger are 

 simpler. Gnathopod 1 in 9 , 6*^^ Joint oval, very narrow at junction with 

 the finger which equals it in length. Gnathopod 2 in 9 , 6*^ Joint flattened, 

 narrowly oval, distally produced beyond the minute chela-forming finger. 

 Peraeopod 2 shorter than peraeopod 1, finger notched. Peraeopod 3, 2*^ Joint 

 subcircular. Peraeopod 4, 2^^ Joint broadly oval, 4^^ expanding to the bluntly 

 produced distal end, 5*^ abruptly widened from a narrow neck and then 

 narrowing, but still at apex much wider than 6*^. Peraeopod 5 shorter than 

 4*'\ 2^ Joint very broad, subcircular, crenulate, other joints not specially 

 widened. Pleopods, rami 7-jointed, subequal to peduncle. Uropods 1 

 'and 2, rami spinöse, obtuse. üropod 3, ramus longer than peduncle. Telson 

 as broad as long, with spinules round apical margin. Colour ivory-white. 

 L. 13 mm. 



South-Pacific (Dunedin [New Zealand]). Sand-banks, among roots of littoral 

 plants, above high-water mark. 



