296 AUSTRALIAN MALACOSTEACA. 



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. Plagella of 

 antennae each with about ten articuli. Length -jV in. 



Port Jackson. 



511. Ciliccea crassicaudata. 



Ciliccea crassicaudata, Haswell, 1. c, Vol. v., p. 475, pi. xvii., 

 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 \ in. 



Holborn Istand, 20 fathoms. 



512. Ciliccea hystrix. A.M. 



Ciliccea Tiystrix, Haswell, 1. c, Vol. vi., p. 3, pi. iii., fig. 1. 



Head and body armed above with numerous slender, needle- 

 like spines. Head short and broad, armed anteriorly with close- 

 set, short, delicate spines, and with a pair of thicker bifurcate 

 horns, directed upwards, forwards, and outwards near the posterior 

 margin. First segment of the thorax with a similar pair of 

 bifurcate horns, its lateral border prominent, tridentate ; follow- 

 ing segments short, each with a single transverse row of slender 

 spines, the lateral angles very acute — that of the fifth segment 

 bifurcate. Pirst abdominal segment with two prominent spines 

 on its proximal dilated portion — the posterior process extending 

 nearly as far as the extremity of the abdomen, forked at the tip. 

 Last segment with two rounded elevations, each armed with 



