66 Proceedings of the Royal Society of Victoria. 



The third segment is three times the length of the first, and 

 slightly sinuous at its posterior margin, where the abdomen 

 becomes steeply geniculate. 



The fourth segment about equals the second in length. 



On the fifth segment which is short the median carina bifur- 

 cates and terminates in its posterior margin. 



The sixth segment equals the third in length, and its posterior 

 lateral angles at its articulation with the telson are dentiform. 



The telson is as long as the two anterior segments, and 

 slightly longer than the uropods and terminates in a small tooth, 

 which is supported on either side by two long tine spines, and is 

 somewhat longitudinally ridged and distally fringed with stiff 

 hairs. 



The nropods are narrow and fringed with hairs. 



The first antennae are biflagellate and longer than the squamae 

 of the second pair. 



The second antennae are long and fine, and furnished with the 

 characteristic broad basal squames. 



The chelipedes have the propodos somewhat long and slender, 

 the immobile finger is situate at about one-third the distance 

 between the base of the daotylos and the next joint. The carpos 

 is somewhat globular in outline, and is furnished with a prominent 

 tooth on its inner margin. 



The second pereiopod are short and chelate, reaching only to the 

 carpos of the first pair, and are not clothed with hairs. 



The remaining three pairs have the normal characters of the 

 genus. 



Dimensions of Type. 



in about five fathoms on a sandy bottom. 



Observations. — This species has some affinity with P. australis, 

 Thomson. By the kindness of the author we have been furnished 



