38 ATJSTBALIAN MAIiACOSTEACA. 



punctures. The anterior legs are very robust ; surface smooth 

 but coarsely punctured ; the anterior and posterior margins of 

 the arm are produced into dentated crests, the posterior expansion 

 being greatly dilated towards the distal extremity ; the oblique 

 crest on the anterior surface of the hand is armed with six 

 prominent triangular teeth, the posterior margin being three- 

 dentated; the under surrace of the anterior legs is coarsely 

 punctulated and granulated. The ambulatory legs are smooth, 

 longitudinally carinated on the upper and under surface. [Jf.] 



Shark's Bay, "W. Australia ; Port Jackson (very rare). 



Sub-Family JSumedoninee. 



Carapace usually rhomboidal or sub-pentagonal, with a spine 

 at the juuction of the antero-lateral and postero-lateral margins. 

 Rostrum usually bifid or emarginate. Depressions separating 

 the regions of the carapace obscure or non-existent. Anterior 

 legs of moderate length, not trigonous. 



Genus Zebeida, "White. 



Carapace flat and smooth above. Spines of rostrum and 

 lateral spines of carapace large, laminate. Basal antennal joint 

 large and filling the orbital hiatus. Ambulatory legs with all 

 the joints greatly dilated and compressed, spinous. 



60. Zebrida longispina. 



Zebrida longispina, Haswell, I. c, p. 454, pi. xxvii., fig. 3. 

 Distinguished from Z. Adamsii, White, by having all the 

 spines longer and more acute. 

 Darnley Island, Torres Straits (Macleay Museum). 



Genus G-onato^otus, Adams and "White. 

 Carapace uneven above. Rostrum broad, lamellate, rounded, 

 and very slightly emarginate or entire at its distal extremity. 

 Anterior legs of moderate size. Ambulatory legs slender, not 

 dilated and compressed. 



61. Gonatonotus pentagonus. A.M. 

 Qonatonotus pentagonus, Adams and "White, Zool. of the 



" Samarang," Crust., p. 33, pi. vi., fig. 7 ; Haswell, 1. c, p. 455. 



