AUSTRALIAN' MALACOSTRACA. 81 



138. Thalamita crucifera. 



Portunus crucifer, Fabr., Suppl., p. 361 ; Herbst, pi. xxxviii., 

 fig. 1 ; Latr., Hist. Nat. des Crust, t. vi., p. 31 ; Encycl., t. x., 

 p. 191, etc. 



Thalamita crucifera, M.-Edw., Hist. Nat. des Crust., t. i., 

 p. 462. 



Carapace smooth or a little ridged, and more than twice as 

 > long as its fronto-orbital border. Front deeply cleft and armed 

 with eight large obtuse teeth. Lateral teeth short, broad, and as 

 it were truncate ; the first (that constituting the external orbital 

 angle) cleft at the end so as to appear bifid. Hands nearly of 

 the length of the carapace, and armed above with four thick 

 spines ; fingers deeply grooved and armed with thick compressed 

 teeth. Colour reddish, with yellow spots and bands, of which 

 the median represent a cross. 



Port Jackson. Found also in the Indian Ocean. 



Crenus Nectocaecinus, A. M.-Edw. 



Antero-lateral margins four-toothed, regions well-marked. 

 Front prominent, entire or lobed. Orbits small. Basal joint of 

 the external antenna? straight, narrow, and uniting with the 

 front. Anterior legs short and robust. Abdomen of the male 

 four-jointed. 



139. Nectocarcinus integrifrons. A.M. 



Portunus integrifrons, Latr., Encycl., x., p. 102 (1825) ; 

 M.-Edw., Hist. Nat. Crust., i., p. 415 (1831). 



Nectocarcinus melanodactylus, A. M.-Edw., Ann. Sci. Nat. 

 (ser. 4), xiv., p. 220 (1860). 



Nectocarcinus integrifrons, A. M.-Edw., Ann. Sci. Nat. (ser. 4), 

 xiv., p. 220 (1860) ; Nouv. Arch, du Mus., x., p. 406, pi. xxxviii. 

 (1861) ; Miers, Zool. " Erebus and Terror," Crust., p. 2, pi. i., 

 fig. 3 (1874) ; Cat. Crust. N.Z., p. 30 (1876). 



Carapace but slightly convex, and granulous. Regions dis- 

 tinctly defined. Front wide, arched, and entire. Antero-lateral 

 margins with four teeth, of which the first is the widest, and 

 the fourth small and acute. Anterior legs covered with squamous 

 lines and closely placed granules ; wrist with an acute spine ; 



