544 ON SOME NEW AUSTRALIAN BRACHYUKA, 



Pilummis inermis, n. s. 



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. Cheli- 

 pedes with the propodos 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 ; 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 digital portion. Anterior granular 

 portion and anterior border of carapace, granular portion of 

 chelipedes and borders of ambulatory legs clothed with long hairs 

 Length of carapace Wths inch, breadth f ths inch. 



Hub. Port Jackson. 



Pilumnus glaberrimus, n. s. 



Carapace nearly scpiare, convex, postero-lateral borders nearly 

 parallel ; surface smooth, glabrous, with a few scattered puncta- 

 tions, no trace of inter-regional lines. Front nearly straight, 

 almost entire, but with a very minute mesial notch. Antero- 

 lateral margins rather prominent, with four very obscure low 

 lobes. Orbital borders without teeth. Merus- joint of chelipedes 

 smooth, triquetrous, with two acute teeth at its distal end above ; 

 carpus smooth internally and externally, finely granulous above, 

 its internal and distal angle slightly produced ; propodos much 

 larger in the male than in the female, finely and closely 

 granular above, it outer surface in the female with two regular 

 longitudinal rows of granules, and below, close to the inferior 

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



