58 RECORDS OF THE AUSTRALIAN MUSHUM. 



EUCRATB HAMILTONI, Sp. UOV. 



(Plate xii., figs. 1, l a .) 



Carapace smooth, and, with the exception of the cardiac, with 

 very slight indication of the regions ; convex fore and aft, and a 

 little also from side to side ; the length 1-2 in the breadth. Front 

 nearly straight, with a median notch, its anterior face sulcate, 

 and the lower margin with two mesial lobes, which project so as 

 to be visible from above; the width 3-8 in that of the body. 

 Orbits equalling one-half the front, their superior angles well 

 defined, the exterior indistinct; the upper borders with two sutures, 

 the lower with a blunt lobe internally, followed by a second 

 smaller one ; a small hiatus at the exterior angle. 



Antero-lateral borders arched and clearly defined only 

 anteriorly, their even curve is scarcely broken by two very 

 indistinct nodules. A faintly indicated ridge extends inwards 

 and backwards from the sides behind the second nodule, and at 

 its base a similar one trends forwards again. There are a few 

 punctations near the margins on the anterior portions of the 

 carapace. Postdateral margins distinct in their hinder portions ; 

 the sides extending outwards. 



Pterygostomial regions anteriorly bordered with thick felted 

 hairs. A prominent ridge crosses its hinder portion, which is 

 minutely granular, and with or without long hairs. 



Basal joint of the antennae with a process into the inner 

 orbital hiatus, which excludes the flagellum from the orbit. 



Ischium of external maxillipeds with a longitudinal sulcus, and 

 its inner border finely denticulate. Merus with a prominent outer 

 angle, which makes it a little wider than the preceding joint, 

 which is one and a half times its length ; there are two curved 

 grooves on its outer face. 



Chelipeds unequal, the larger more than twice the length of 

 the carapace, and longer than the legs. Arm with a large 

 tubercle at the distal end, and another smaller one halfway along 

 its length, the lower surface with minute scattered granules. 

 Wrist with a strong inner tooth, and its anterior margins 

 clothed with a dense felted pubescence. Hands massive, with a 

 strong external tooth between the fingers, and a blunt ridge near 

 the lower anterior border. Fingers crossing when closed, strongly 

 toothed, and those of the larger hand with the distal half gaping. 



Ambulatory legs smooth, the carpal joints with a few hairs 

 distally. Propodi and dactyli each with eight rows of puncta- 



