AUSTKALTAN MAI/ACOSTEACA. 191 



of the antennules. Orbits anteriorly armed with a spinule, a 

 little shorter than the rostrum. Basal squame of the antennules 

 of the length of the first joint ; second joint of the peduncle 

 twice as long as the first. Base of antennas armed with a long 

 and acute spine, almost reaching the apex of the second joint of 

 the peduncle of the antennules. Appendices very narrow 

 anteriorly, almost triangular, shorter than the peduncles, with a 

 large apical spine passing beyond the apex of the peduncle of 

 the antennules. Anterior legs unequal ; larger hand a little 

 twisted outwards towards the extremity, the palm compressed, 

 with entire margins, the upper margin provided with two longi- 

 tudinal ridges ; surface sparsely hairy ; fingers very short, hairy. 

 Second pair of legs longer than the third ; posterior feet rather 

 stout, the merus unarmed, the tarsus spinulose below, the dactylus 

 acute, short. 



Sydney (Heller). Found also at Auckland, New Zealand. 



358. Alpheus laevis. 



Alpheus laevis, Randall, Journ. Acad. Philad., viii., p. 141 ; 

 Dana, 1. c, p. 556, pi. xxxv., fig. 8 ; Heller, Reise der Novara, 

 Crust., p. 107. 



Rostrum acute, spinif orm, arising between the bases of the 

 eyes, sides almost straight. Basal scale of the external antennas 

 not shorter than the base, scarcely longer than the base of the 

 internal antennas ; basal spine of the external antennas moderate, 

 that of the internal antennas greatly elongated. Orbital spine 

 very short. Anterior legs a little unequal, the larger hand smooth, 

 compressed, with rounded entire margins, the fingers short ; 

 smaller hand oblong. Second pair of legs scarcely longer than 

 ths third, the first joint of the carpus scarcely longer than the 

 second, as long as the hand. Third pair of legs having the lower 

 apex of the third joint not acute, tarsus broad and short. 



Sydney (Heller) ; found also at the Society and Friendly 

 Islands, the Sandwich Islands, and Fiji. 



Genus Bemus, Dana. 



Resembles Alpheus. Front without rostrum. Anterior hands 

 more or less inverted, the mobile finger being the lower or outer. 



