BY W. A. HASWELL, M.A., B.Sc. 475 



posterior margin. Second segment of the abdomen with a pair 

 of low, mammiform elevations towards its middle ; central lobe 

 triangular, longer than those bordering the notch. Eami of 

 caudal appendages sub-equal, pointed, sparsely ciliated. Length 

 f inch. 



B'ab. Port Denison, Queensland. 



Cilicaea tenuicaudata, sj). no v., Plate XVII., fig. 2. 



Surface obscurely granular. Postero-lateral angles of the 

 segments of the thorax sub-acute Penultimate abdominal 

 segment obscurely tubercular ; median spine very long, extending 

 far beyond the extremity of the abdomen, narrow, blade-like, 

 bifurcate at the tip. Last segment of the abdomen with two 

 rounded mammiform elevations ; a deep mesial excavation at its 

 posterior extremity. Peduncle of caudal appendages with a short 

 spine representing the internal ramus; outer ramus ciliate, 

 narrow, slightly curved backwards, extending rather beyond the 

 extremity of the mesial spine, bifurcate at the tip. Flagella of 

 antennae each with about ten articuli. Length 5/16 inch. 



S'ab. Port Jackson. 



Cilicaea crassicaudata, sp. 9iov., Plate XYIL, fig. 3. 

 Surface finely granular. Postero-lateral angles of the thoracic 

 segments blunt. Penultimate segment of the abdomen slightly 

 swollen ; median spine rather short, not extending beyond the 

 middle of the uropoda, thick, clothed with short cilia, apex entire, 

 blunt. Last segment of the abdomen with two mammiform 

 elevations ; its posterior extremity deeply notched ; notch with a 

 low mesial lobe. Basal segment of the caudal appendages with a 

 blunt process on its inner border ; mobile ramus sub-cylindrical, 

 ciliated, curved inwards, extending beyond the extremity of the 

 median spine, apex rounded, entire; immobile ramus rudimentary. 

 Length ^ inch. 



Sab. Holborn Island, 20 fathoms (a single specimen). 

 3 I 



