402 REV. T. E. E. STEBBING ON AMPHIPODA FROM 



Orchestia grillus (Bosc). 



1802. Talitrus grillus Bosc, Histoire Naturelle des Crustacees, vol. ii. p. 152, \i\. 15. figs. 1, 2 (called 

 on the plate ' Thalitre terrestre ') . 



It is not necessary here to discuss the synonymy of this species, which nearly resembles 

 Orchestia gammarellus (Pallas). It is only mentioned for the sake of recording an 

 abnormality in a male specimen belonging to the Copenhagen Museum. The second 

 peraeopod on the right side has been cicatrized near the base of the fourth joint, but 

 attached to the same side-plate that carries the damaged limb is a limb with the full 

 number of joints, though these are less strongly developed than those of the limb on the 

 left side or than the remaining joints of the broken limb. 



JTah. The specimen is labelled " New York Omegn, L. Lund," meaning that it was 

 obtained by L. Lund in the neighbourhood of New York. 



Parorchestia, n. g. 



Like Orchestia, except that the maxillipeds have a fourth joint to the palp, distinct, 

 though small, conical, and airrying a spine on the truncate aj^ex. 



The name is derived from -Tru^a, near, and Orchestia. The genus is formed to receive 

 the species (1) Orchestia tennis Dana, with which the Allorchestes recens of G. M. 

 Thomson seems to be identical; (2) Orchestia hawaiensis Dana; and (3) Orchestia 

 sylvicola Dana. 



Hyale Galate^e, n. sp. (Plate 31 B,) 



The species occurs both in the Atlantic and the Pacific, with the slight difference that 

 in the Atlantic specimens the integument appears to be smooth, while in those from the 

 Pacific the back and to some extent the appendages are scabrous, with little hairs or 

 scales like a capital T inverted. The first side-plates are widened below, the second and 

 third pairs are not very deep. The third pleon-segment has the postero-lateral corners 

 quadrate. 



Eyes. Large, oval, black, nearly meeting at the top of the head. 



First antenna. Much longer than the peduncle of the second antennae ; joints of the 

 peduncle small, successively shorter ; flagellum in d with nine, in 2 seven, distally 

 Avidened joints. 



Second antennce. About one-third as long as the body ; last joint of the peduncle 

 considerably longer than the penultimate ; flagellum of d with twelve to fourteen, of 

 $ nine joints. 



First maxillce. The palj) has a small constriction. 



Maxillipeds. The curved fourth joint of the palp is slender. 



First gnathopods. 6 ■ The second joint is short and broad, with narrow base ; the 

 fourth is distally squared ; the fifth is as broad as long, with a rounded lobe behind 

 carrying spines along the somewhat flattened hind margin ; the sixth joint is rhomboidal, 

 distinguished by a small hump at the centre of the long front margin, the much shorter 



