AUSTBAIIAN MALACOSTEACA. 219 



Female. — Inferior antennae much smaller than in the male. 

 Anterior gnathopoda with the carpus much longer and broader 

 than the propodos, the latter about twice as long as broad, rather 

 narrower at its distal than at its proximal end. Posterior 

 gnathopoda with the propodos narrow, thrice as long as broad, 

 the dactylos very short, inserted nearer the distal end than the 

 middle of the ventral border of the propodos. 



Tasmania (Australian Museum.) 



G-enus Obchestia, Leach. 



Distinguished from Talorchestia by having the first pair of 

 gnathopoda subcheliform in both sexes. 



399. Orchestia capensis. 



Orchestia capensis, Dana, Explor. Exped., Crust, ii., p. 866, pi. , 

 58, fig. 3, (1852), Spence Bate, Cat. Amphip., p. 23, pl.iv., fig. 2, 

 (1862.) 



Male, — Eyes rather large. Upper antennae reaching to the 

 extremity of the penultimate joint of the peduncle of the lower. 

 Lower antennae half as long as the animal ; the flagellum not 

 longer than the last joint of the peduncle, which joint is nearly 

 as long again as the penultimate. Eirst pair of gnathopoda with 

 the palm indented or concave, and no tubercle on the carpus, 

 dactylos longer than the palm and incurved. Propodos of second 

 pair of gnathopoda well developed, and the palm deeply concave. 

 Third pair of pereiopoda shorter than the fourth, robust. The 

 basos of the three posterior pereiopoda disk-shaped. [2).] 



Australia. Eound also at the Cape of Good Hope. 



400. Orchestia dispar. 



Orchestia dispar, Dana, U. S. Explor. Exped., Crust., ii., 

 p. 878, pi. lix., fig. 6 ; Spence Bate, Cat. Amphip., p. 32, pi. v., 

 fig. 5. 



Male. — Coxae of moderate size, fifth but little shorter than 

 fourth. Inferior antennae scarcely half as long as body ; last 

 two joints of base subequal ; flagellum longer than base ; joints 

 hardly oblong ; setae not longer than half the diameter of the 

 joints. Superior antennae shorter than base of inferior. Eirst 

 pair of gnathopoda having the propodos quite small, broadest at 



