70 AUSTRALIAN MALACOSTKACA. 



inferior margin, an acute ridge, which is continued to near the 

 extremity of the immobile finger. Borders of the carapace in 

 the male smooth, or with a few irregular granules. Abdomen 

 and limbs lined with fringes of long hairs. 



Port Jackson. 



121. Pilumnus inermis. A.M. 



Pilumnus inermis, Haswell, 1. c. 



Carapace slightly convex, postero-lateral borders converging, 

 surface smooth behind and in the centre, finely granular on the 

 front and near the antero-lateral margins. Front convex, entire, 

 with a slight mesial groove above. Orbital margins not toothed. 

 Antero-lateral margins with three very obscure notches. Anterior 

 limbs with the hand much larger in the male than in the female, 

 very broad in the former, finely and closely granulous above, 

 nearly smooth externally, but with a few obscure granules and a 

 low longitudinal ridge near the lower margin ; in the female 

 finely granular above, on the proximal portion of the outer 

 surface and below, and with a longitudinal row of granules on 

 the outer surface close to the lower border, becoming a well- 

 marked entire ridge on the immobile finger. Anterior granular 

 portion and anterior border of carapace, granular portion of 

 anterior legs and borders of ambulatory legs clothed with long 

 hairs. Length of carapace 5/16ths inch ; breadth |ths inch. 



Port Jackson. 



Genus Pilumnopeus, A. M.-Edw. 



Eesembles Pilumnus, but the carapace and legs are without 

 the long hairs so characteristic of that genus, the teeth of the 

 antero-lateral margin are broad (never spinous), and there is an 

 external orbital hiatus as in Panopeus. 



122. Pilumnopeus serratifrons. Plate ii., fig. 1. A.M. 



Oxius/ serratifrons, Kinahan, Journ. Eoy. Dublin Soc, i., 

 p. 113, pi. iv., fig. 1 (1S50) ; Miers, Cat. Crust. N.Z., p. 20 

 (1876). 



? Hcteropanope austrahensis, Stimpson, Proc. Acad. Nat. Sci. 

 Philad., Vol. x., sp. S7 (1S5S). 



