318 CRUSTACEA DREDGED OFF PORT JACKSON, 



two centre ones are the largest; below this the hepatic regions 

 are much swollen and are armed with three rounded tubercles 

 terminating in sharp horizontally directed spinules. 



The gastric region carries three well marked tubercles in the 

 form of a triangle, of which the apex is directed backwards. 



The carapace also bears a number of irregularly disposed short 

 tubercles clothed with minute hairs. 



The eye-stalks are little more than half the length of the supra- 

 ocular spines, which completely conceal them from dorsal view. 

 The eyes are subspherical and well pigmented. 



Chelipedes about half the length of the three following legs, 

 cylindrical, very slender and entirely smooth. Fingers about 

 half as long as the palm. Only the joints from the merus to the 

 dactylus are visible when viewed from above. 



The three following legs are about three times the length of 

 the carapace and have all their joints visible when view-ed from 

 above. The basal joint of each is armed above with a spinule. 

 The merus of each has a series of about six spinules almost equi- 

 distantly placed both above and below, in addition to which the 

 distal end is armed with a sharp upwardly directed spine. The 

 carpus and propodus are entirely smooth and cylindrical. The 

 dactj^i are long, flat and curved, and are armed on their inner 

 margin with six sharp spiniform teeth. 



The last pair of legs are somewhat shorter than the preceding 

 pairs. The basal joint is armed with a spinule and the merus 

 has a series of five equidistant spines below and one above at its 

 extreme distal end. The carpus is unarmed. The flattened 

 dactylus carries a series of sharp spines on its inner border and 

 folds down like a knife-blade between a double row of spines on 

 the posterior border of the propodus. 



The abdomen (fig.2rt) has seven distinct segments; the 1st, 2nd, 

 and 3rd terga carry an acute spinule in the middle line, which 

 in the next two segments is replaced by a blunt tubercle. The 

 penultimate carries two acute spinules; there is also a prominent 

 spine with serrate edges in the middle of its anterior margin. 



The last tergum has the characteristic shape of a spear-head. 



