SOME AUSTRALIAN FRESHWATER COPEPODA AND OSTRACODA. 35 



Male smaller than the female. Right antermule bearing 

 three sensory processes, middle section moderately swollen. 

 Last pair of legs powerful; both rami three segmented. 

 Right leg with a curved terminal spine on the outer ramus; 

 second and third segments with denticulated spines; third 

 segment produced into a projection on the inner edge; 

 inner ramus bearing setse. Left leg short and stout; outer 

 ramus with three short spines on the third segment, and 

 one on each of the other two; inner ramus armed with one 

 short spine. Length 1*0 mm. 



Collected at Kendall and Waterfall in May and June. 

 Type specimen in the Australian Museum, No. ? P 4336, 

 S P 4337. 



Gladioferens brevicornis, sp. n. 

 (Plate II, figs. 10-12.) 

 The average length of the adult female is about 1 mm. 

 The general form of the body is rather slender with the 

 anterior division oval in shape, tapering in front and behind. 

 The greatest width occurs about the middle. The head is 

 narrowly rounded and has a very small rostral prominence. 

 The last pedigerous segment is small, hardly expanded at 

 all, the lateral parts being rounded off and tipped with a 

 bristle. 



The abdomen is slender and composed of four segments. 

 The genital segment is rounded, widening posteriorly; the 

 second segment is short and somewhat rounded ; the third 

 is longer and narrower; the fourth is about as long as the 

 second. 



The caudal rami are fairly long, and only slightly diver- 

 gent. The outer edge of each ramus has a little ledge from 

 which the outermost seta springs; the two middle setse of 

 the terminal four are longer than the inner and outer ones. 



The antennules are not very long, only extending, when 

 reflexed, to the end of the cephalothorax. They are com- 



