GAMMARIDEA. 877 



both are alike in having the inferior margin nearly parallel with the 

 superior. The claw shuts against the truncate apex. The hand of 

 the second pair has no angle at the termination of the palm. The 

 setae or hairs of the legs are very short, hardly as long as diameter of 

 the joint bearing them. The ten posterior legs are all very slender. 

 These animals were very active. 



0. spinipalma, Dana, Proc. Amer. Acad. Sci., ii. 203. 



Orchestia tahitensis. 



Feminae : — Epimerce mediocres, margine mmute setulosce* Antennce 2dce 

 dimidii corporis longitudine, flagello parce longiore quam basis, arti- 

 culis paulo oblongis, sells brevibus latitudinem articidi fere cequantibus. 

 Antennce lmce, basi 2darum tertid parte breviores, flagello fere 7-arti- 

 culato. Pedes 4 antici debiles, lmis subtilissime unguiculatis, manu 

 imperfecta; Idis paulo longioribus, manu parvuld recta, subspatulatd, 

 apice rotundatd, digito minuto laterali, longitudinali, apicem articidi 

 vix attingente. Pedes 4 sequentes subcequi. Pedes 6 ultimi non multo 

 incequi, setis brevibus, articulo primo latissimo, margine postico setu- 

 loso. 



Female: — Epimerals rather broad, margin minutely setulose. Infe- 

 rior antennas about half as long as body, nagellum little longer than 

 base, the joints a little oblong, setae not longer than diameter of 

 joints. Superior antennae one-third shorter than base of inferior, 

 nagellum about seven-jointed. Four anterior feet quite small; first 

 pair having a minute claw and an imperfect hand ; hand of second 

 pair oblong, spatulate with rounded apex, minute finger lateral and 

 longitudinal, hardly reaching to apex of joint. Next four feet sub- 

 equal; last six not very unequal, first joint very broad and poste- 

 rior margin setulose, setae of feet very short. 



Plate 59, fig. 5 a, animal, enlarged; b, mandible; c, first pair of 

 maxillae; d, second pair; e, maxillipeds; /, antennae, much enlarged; 

 g, extremity of leg of second pair. 



In damp places among leaves, and under rotten wood in the damp 



220 



