Description of Two New Phyllopoda. 13 



Probably the specimen had not yet deposited any ova in 

 the mud. 



When still in its full vigour, the animal was extremely 

 rapid in its movements, twisting away in all directions, in 

 most cases with the back downwards. The movements 

 were effected partly by the aid of the rhythmically swinging 

 branchial legs, partly by abrupt strokes of the very flexible 

 tail, in which the densely setous caudal rami seemed to be 

 of essential service. 



Occurrence. — The mud from which the specimen was 

 raised, was taken during the previous year by Mr. Archer from 

 a water hole at Cattle Station — salt at high tides — 20 miles 

 from Rockhampton, Queensland. From the same sample of 

 mud, several other Entomostraca were also raised, and have 

 been described and figured by the present author in another 

 paper. Some other specimens, apparently of the same 

 Branchipodid, but all of them still immature, were recently 

 received from Mr. Knut Dahl, who collected them together 

 with the other Phyllopod here described, from a shallow 

 pool on Mount Showbridge, near Port Darwin, North 

 Australia. 



