100 CRUSTACEA. 



Pitt's Island, the northern island of the Kingsmill Group ; collected 

 from coral reef, April 30th, 1841, by Lieutenant 0. H. Perry. 



Length, two and a half lines. The surface of the carapax is uneven 

 and the regions are distinct. In an upper view the outer antennae 

 appear to arise near the orbits, and quite distant from the beak. The 

 second joint (the first moveable), is a little longer than the third. 

 The eyes are much longer than half the space intervening between 

 the two orbits. 



The anterior pair of legs is about two-thirds the length of the 

 second pair ; the hand is long and slender ; the second and third pairs 

 are the longest, the second about one and a half times the carapax. 

 The horns of the beak are separated by a narrow triangular interval. 



FAMILY EURYPODID^E. 

 SUBFAMILY EURYPODIKZE. 

 GENUS EUKYPODIUS, Guerin. 



IN the Eurypodii, the carapax is triangular, rounded behind, with 

 in front a prominent, slightly arcuate beak, divided into two slender 

 approximate horns, the furcation extending quite to the antennary 

 fossae. The upper surface of the carapax has a protuberant median 

 region, and a prominence over the cardiac region, which is partly con- 

 tinued over the lateral regions. Each species known has on the 

 medial line of the carapax two spines on the median region, one (or 

 two on a transverse line) on the posterior part of the cardiac, and one 

 on the posterior margin, besides sometimes others; also laterally there 

 are one or more spines. There is a prominent post-orbital spine, and 

 a small prominence, sometimes acute, just anterior to it. 



The eyes form an oblong, ovoid prominence at the extremity of the 

 pedicel, the longest diameter being vertical. 



The septum between the inner antennae is prominent, and is 



