550 ON SOME NEW AUSTRALIAN BRACHYURA, 



tlic preceding species. Anterior legs very large in the male ; 

 hand swollen, smooth ; fingers very widely gaping, the gap being 

 covered over by a thick bundle of hairs arising from the bases of 

 the fingers and the extremity of the palm ; a narrow ridge on 

 the outer surface of the lower finger not continued on the palm ; 

 inner borders of fingers finely toothed, apices slightly spoon- 

 excavate. Ambulatory legs finely tomentose, terminal and 

 penultimate joints fringed below with long hairs. Colour light 

 pink with purple markings. Length J inch ; breadth fths inch. 



Holborn Island, near Port Denison, on the sea-shore. 



A near ally of TJ. harbimana, A. M.-Edw., hut differing from 

 it in the relatively broader carapace, the larger hands, the more 

 arched fingers, hairy terminal joints of the ambulatory legs, and 

 other points. 



Chasmagnathus convexus, n. s. 



Carapace strongly convex both in the transverse and the 

 antero-posterior direction ; surface very minutely granular, 

 lateral border arched anteriorly, with one tolerably deep incision. 

 Front strongly deflexed, its anterior border with a slight angular 

 mesial incision and a lateral shallow concavity so as to appear 

 very obscurely four-lobed. Anterior legs (in the female) very 

 finely granulate ; fingers regularly toothed, a slight space between 

 them at the base. Length f-ths inch ; breadth 1 inch. 



Hah. Shoalhaven (Australian Museum.) 



Hymenosoma rostratum, n. s. 



Carapace sub-orbiculate, rather longer than broad. Rostrum 

 produced, acute, slightly recurved ; an obscure tooth at its base 

 in front of the eye ; a prominent acute tooth behind the eye, 

 and another about the middle of the lateral margin. Three 

 prominent tubercles on the pterygostomial regions. Chelipedes 

 in the male very large, arm trigonal, a sharp tooth at the distal 

 end of its upper border ; carpus with three short, much elevated, 



