754 DESCRIPTION OF SOME NEW AUSTRALIAN DECAPOD A, 



acute teeth ; a very obscure raised Hue crossing the carapace 

 inwards and slightly backwards from the last tooth. Merus of 

 chelipedes with three or four small acute teeth on its inner 

 border ; carpus with an acute prominent spine above ; propodos 

 carinated above, the carina divided into two teeth, of which the 

 posterior is very acute ; external surface of the propodos with an 

 acute spine at its base. 

 Palm Island (East coast of Queensland), (Macleay Museum). 



This species is allied to C. Icevis, A. Milne-Edwards, but differs 

 from it in having only four teeth on each lateral border ; from 

 C. rotund if rons, of the same author, it differs in having the front 

 dentate, and from C. polita, Heller, in not having a ridge on the 

 gastric region, besides other points. 



9. Hymenosoma australe, sp. n. 



Carapace sub-orbiculate, the length (exclusive of the rostrum) 

 a little less than the greatest breadth. Eostrum prominent, 

 deflexed, its upper surface concave from side to side, bordered 

 laterally by a raised ridge, which terminates near the extremity 

 in a slight enlargment ; extremity in the form of an obtuse angle. 

 Lateral borders of the carapace with two obscure teeth. 

 Chelipedes of the male extremely large ; propodos dilated, 

 smooth, rather sharp-edged below ; fingers gaping at the base. 

 Chelipedes of female small ; hand not dilated ; fingers straight. 

 Length \ in. 



Williamstown, Port Philip. 



10. Phlyxia Petleyi, sp. n. 



Carapace rhomboidal, in general outline similar to that of P. 

 lambriformis. Eront emarginate ; antero-lateral borders with 

 three conical teeth, the first rather larger than the others, a fourth 

 smaller tooth at the junction of the antero-lateral and postero- 

 lateral borders ; postero-lateral border with three compressed 

 conical teeth ; three prominent, sub-equal, conical teeth behind, 



