192 ON SOME NEW AUSTRALIAN MARINE ISOPODA, 



than the rest. Outer ramus ofuropoda longer than the inner, 

 projecting far beyond the extremity of the abdomen, lanceolate- 

 acute, with an acute tooth on its inner border. Inner ramus 

 extending slightly beyond the extremity of the abdomen, 

 acuminate. Length £ in. 



Hah. Griffiths' Point ; Port Philip. 



Fam. msmm. 



Genus ^Ega, Leach. 

 ^Sga cyclops, sp. nov. 



Surface finely punctured. Breadth about two-fifths of total 

 length. Segments of the thorax subequal, epimera of last five 

 produced behind to a point. Abdomen little narrower than the 

 thorax. Terminal abdominal segment sub-triangular — the apex 

 rounded. Eyes confluent, occupying nearly all the upper surface 

 of the head. Uropoda with the outer ramus smaller than the 

 inner, narrow, ovate-acute ; the inner broad and obliquely truncate; 

 an acute triangular process arising from the peduncle extends 

 beyond the middle of the inner rami. Length 7/16ths in. 



Hal. Port Jackson. 



Genus Cirolana, Leach. 



Cirolana lata, sp. nov., Plate IV., fig. 1. 



Surface finely punctured. Greatest breadth about half the 

 total length. Head received into a depression in the anterior 

 border of the first segment of the thorax. First segment of the 

 thorax as long as the two following segments ; posterior segments 

 all short ; epimera of last four produced backwards to an acute 

 angle. Abdomen much narrower than thorax. Terminal segment 

 triangular, sub-acute. Legs thick and very spinose. Outer 

 ramus of caudal appendages much narrower than the inner, but 

 of about equal length, sub-acute ; inner slightly sigmoid, sub- 

 acute, armed with a tooth on its inner edge ; basal spine narrow, 



