116 AUSTBALIAN MA1AC0STRACA. 



without teeth. The ocular peduncles are far over-reached 

 by the rostrum ; the legs very long, covered with sharp hooks, 

 the fingers toothless, the abdomen three cornered. [Hess.] 



Sydney (Gottingen Museum). 



213. Hymenosoma rostratum. 



Hymenosoma rostratum, Haswell, 1. c. 



Carapace sub-orbiculate, rather longer than broad. Eostrum 

 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, 

 tooth-like carinae ; propodos broad, compressed, prominently 

 keeled above, obscurely keeled below ; fingers each with a basal 

 tooth ; immobile finger with a second but lower elevation about 

 the middle. Length -/ 6 - inch ; breadth J inch. 



Griffiths' Point, Port Western, Victoria. 



Family IV. MYCTHBIDJS. 



Body thick. Carapace very narrow anteriorly, scarcely 

 rostrate, without orbits. Internal antennae rather small, longi- 

 tudinal. [Z>.] 



Genus Mtcteeis, Latr. 



Carapace nearly circular, much dilated above. External 

 maxillipedes nearly vertical, forming a short and broad reversed 

 cone. Anterior legs very long ; ambulatory legs long, slender, 

 and compressed. Abdomen of the same form in both sexes, 

 enlarged towards the end. 



214. Mycteris longicarpus. 



Mycteris longicarpus, Latr., Encycl., pi. 297, fig. 3 ; Desmarest, 

 Cqnsid. Crust., pi. 11, fig. 2 ; Guerin, Icon. Crust., pi. iv., fig. 4 ; 

 M.-Edw., Hist. Nat. Crust., ii., p. 37 (1837) ; Ann. Sci. Nat. 

 (3 ser.) xviii., p. 154 ; A. M.-Edw., Nouv, Arch, du Mus., t. ix., 

 p. 276, 



