194) AUSTRALIAN MALACOSTEACA. 



362. Anchistia aesopia. 



Anchistia cesopia, Spence Bate, P. Z. S., 1863, p. 502, pi. xli., 

 fig. 5. 



Rostrum nearly straight, armed above with nine teeth, the 

 posterior standing near the centre of the carapace, and with two 

 below near the apex. Carapace with an infra-orbital, a post- 

 orbital, and an anterior branchial tooth. Pleon with the third 

 segment postero-dorsally carinated and elevated into a hump-like 

 tooth, being posteriorly produced to a point. Internal antennae 

 having the peduncle as long as the rostrum ; the first joint, 

 which is longer than the other two, broad, squamiform, and 

 armed with two teeth ; primary and secondary flagella fused 

 together for about two-thirds of the length of the primary, the 

 secondary half as long again as the primary, and the tertiary 

 one-third of the length of the primary. Basal scale of external 

 antennae rounded at the point, armed with a tooth, and reaching 

 quite to the extremity of the rostrum, the flagellum being as long 

 as the animal. First pair of legs chelate, slender, the propodos 

 slightly enlarged, the dactylus straight and nearly as long as the 

 propodos. Second pair longer and thicker than the first, 

 dactylus slightly longer than the antagonising process of the 

 propodos. Telson obtuse at the apex and furnished with two 

 long and four short spiues. [S. i?.] 



Gulf of St. Vincent. 



Genus Pal^hon, Pabr. 

 Carapace somewhat compressed and rounded above, with a 

 marginal spine below the eyes, and sometimes a second spine 

 placed behind it upon the hepatic region. Rostrum long, later- 

 ally compressed and dentated. Eyes prominent, not concealed 

 by the carapace. Internal antenna? with three flagella. External 

 maxillipedes slender. Mandibles with a three-jointed palpus. 

 Pirst and second pairs of legs chelate, the first pair slender, the 

 second much longer and thicker, but not lamellate. Abdomen large. 



Sub-Genus Leander, Desmarest. 

 Carapace with a lateral spine on the front margin, and a 

 second marginal or sub-marginal spine placed beneath it, but 

 without a spine on the hepatic regin behind the upper marginal 

 spine. (Species usually of small size. Legs of the second pair 

 not so greatly developed as in Palamon.) 



