AUSTRALIAN HALACOSTRACA. 185 



345. Hippolyte gibberosus. 



Hippolyte gibberosus, Milne-Edwards, Hist. ]^at. Crust., ii., 

 p. 378. 



Rostrum taking origin in the posterior third of the carapace, 

 much arched, and armed with four or five teeth at its base, then 

 recurved strongly upwards, and having only one small spine 

 towards the line of the extremity of the eyes, and two or three 

 denticles at its point ; lower border descending very low at the 

 base, and armed with six or seven teeth, of which the posterior 

 are very strong. Lateral spine of the internal antenna? very 

 large. Lamellar appendage of the external antennae nearly 

 triangular. External maxillipedes short and truncated at the 

 end. Anterior legs very small, and scarcely passing beyond the 

 peduncle of the external antennae, those of the second pair longer 

 than those of the third, and having the lower part of the carpus 

 divided into a large number of joints. [M.-E.] 



Australia (Mus. Paris). 



Genus Angasia, White. 



Like Hippolyte, but the rostrum without dorsal carina, and 

 the mandibles without appendage. 



346. Angasia pavonina. 



Angasia pavonina, Spence Bate, P. Z. S., 1863, p. 498, pi. xl., 

 fig. 1. 



Rostrum projecting as far in front of the eye as the carapace 

 extends behind it, with a deep carina upon the inferior surface, 

 having the margin furnished with .four small teeth. Internal 

 antennae short, flagella reaching scarcely more than half the 

 length of the rostrum ; first joint of the peduncle with a long 

 tooth. Pasal squame of external antennae reaching nearly to 

 the extremity of the rostrum, flagellum reaching more than the 

 length of the rostrum beyond it. External maxillipedes flat or 

 spatuliform, fringed at the apex with eight or nine robust teeth. 

 First pair of legs short, robust, and chelate, having the propodos 

 longer than the carpus. Second pair long, slender, and chelate, 

 having the propodos shorter than the carpus. Remaining pairs 

 of legs shorter than the second and rather stouter ; inner surface 

 of the carpi and propoda armed with spines. Pleura of the five 



