220 AUSTRALIAN MALACOSTEACA. 



apex, and obliquely truncate, with the apical margin excavate. 

 Propodos of second pair stout, broad, subelliptical, obliquely 

 subtruncate ; palm of the propodos a little sinuous, pubescent. 

 First pair of pereiopoda longer than second ; fifth a little shorter 

 than fourth, and having the meros and carpus stout, very broad, 

 and much compressed ; setae very short, on propodos about as 

 long as semi-diameter of the joint. [D.] 

 Illawarra, New South Wales (Dana). 



401. Orchestia Macleayana. 



Orchestia Macleayana, Haswell, 1. c, Vol. iii., p. 250, pi. vii., 

 fig. 2. 



Male. Inferior antenna? as long as the cephalon and first four 

 segments of the pereion ; the peduncle stout and longer than the 

 flagellum. Superior antennae about one-third of the length of 

 the inferior pair, slightly exceeding the cephalon in length ; 

 flagellum and peduncle subequal. Anterior gnathopoda with 

 the carpus triangular, longer than the propodos ; the propodos 

 broader at its distal than at its proximal end, the palm 

 transverse. Posterior gnathopoda with the propodos large, 

 cordif orm, thrice as long as that of anterior pair ; palm oblique, 

 undefined, waved. First pair of pereiopoda longer than second. 

 Second pair with the meros broader than that of first pair. Three 

 posterior pairs increasing progressively in length, the fourth pair 

 much longer than the third, and the fifth slightly longer than the 

 fourth ; basos of the fifth with a tooth on its posterior margin. 

 Posterior pleopoda short. Telson triangular, blunt. 



Female. Posterior gnathopoda with the propodos shorter than 

 the carpus, oval ; dactylos rudimentary. 



Length 4| lines. 



Sandy beaches, Port Jackson ; Kiama, New South "Wales ; 

 found among decaying sea-weed. 



Genus Allorciiestes, Dana. 



Superior antennae as long as the peduncle of the inferior, the 

 basal articulations imperfectly fused into the facial wall of the 

 cephalon. Olfactory spine rudimentary. Mandibles without 

 an appendage. Maxillipedes furnished with a pointed dactylos. 

 Both pairs of gnathopoda subcheliform. [S. .] 



