152 DECAPOD CRUSTACEA FROM NORFOLK ISLAND, 



Anterior lateral margins short, not lobulate, but carrying five 

 or six small almost equidistant spinulous tubercles. 



Chelipeds very unequal, either the right or left the larger. 

 Carpus of larger cheliped smooth proximally, but carrying on its 

 distal margin two rows of rounded tubercles which become spinu- 

 lous above; some stiff hairs on its anterior margins. The upper 

 margin of the hand is equal to the length of the finger, its inner 

 surface punctate, and the outer with a number of smooth rounded 

 tubercles having a roughly linear arrangement; a patch of short 

 stiff yellow hairs at the base of the wide gape between the fingers. 

 Finger and thumb acuminate, quite smooth; not dentiform, but 

 each showing a tendency to bear a low rounded tubercle. 



In the smaller cheliped the tubercles on the outer surface of 

 the palm are markedly spinulous, and the fingers, which are con- 

 siderably bent inwards, are costate, dentiform, meeting along 

 their whole length when closed, and spoon-excavate at the tips. 



Ambulatory legs somewhat flattened and clothed with scattered 

 stiff yellow bristles. 



The abdomen of the male is seven-jointed, the third joint being 

 the widest. 



Colour in spirits dark chestnut-brown, the chelipeds reddish, 

 fingers black, white at the extreme tips. There is a patch of 

 reddish colour on the palm behind the base of the mobile finger 

 and at the junction of the carpus and propodus. 



Dimensions of type (,-J): — 



Breadth of carapace between lateral angles 18 mm. 



Length of carapace 13 ,, 



Length of larger cheliped 30 ,, 



A number of specimens were collected by Mr. Liddell, who 

 informs us that it is common on the island, where it is known 

 as the " Poison Crab." 



The type is in the Australian Museum. 



Cymo andreossyi (Audouin). 

 1852. Dana, U. S. Explor. Exped., Crust, i. p. 225, pl.xiii. figs.2a-6. 

 Common (Liddell). 



