76 AUSTRALIAN MALACOSTBACA. 



130. Trapezia cymodoce. A.M. 



Cancer cymodoce, Herbst, Krabben unci Krebse, iii. (2), p. 22, 

 pi. li., fig. 5 (1801). 



Trapezia dentifrons, Latr., Encycl. Method., x., p. 695 (1825) ; 

 M.-Edw., Hist. Nat. Crust., i., p. 428 (1834). 



Trapezia hirtipes, Jacq. & Lucas, Voy. Pole Sud, Zool., iii., 

 Crust., p. 44, pi. iv., fig. 14 (1853). 



Trapezia easrulea, Heller, Sitzungsb. Berlin Akad., p. 348 

 (1861), nee Riippell. 



Trapezia cymodoce, Miers, Ann. and Mag. Nat. Hist. (5), 

 Vol. ii., p. 409. 



Carapace without red spots or reticulating lines. Front with 

 six more or less distinct teeth. Lateral margin with an acute 

 spine in the middle. Hand sub-cristate above and below and 

 hairy on its outer surface. 



Port Denison ; Claremont Islands. 



Family III. PORTTJNIDM. 



Carapace depressed, usually more or less hexagonal in shape, 

 never very convex. Antero-lateral margins with well-defined 

 acute teeth. Inner ramus of the first (innermost) pair of 

 maxillipedes with an internal lobe. Margin of the efferent 

 branchial channel usually defined by a longitudinal ridge on 

 each side of the prelabial plate or palate. Fifth pair of ambula- 

 tory legs natatorial, their terminal joint oval, expanded, and 

 lamellate. f 



Genus Nbpttjnus, De Haan. 



Carapace very wide, with transverse granulous lines. Latero- 

 anterior margins with nine or more teeth (including the external 

 orbital angle), the last tooth much the longest. Front wide and 

 divided into five or six teeth. Flagellum of external antennae 

 placed in the internal orbital hiatus. External maxillipedes 

 short. Anterior legs long, arm with acute tubercles upon the 

 anterior margin ; hand nearly prismatic, with longitudinal ridges 

 giving rise above to spinif orm tubercles. Thigh of the swimming 

 legs with the lower margin usually destitute of spines. 



