BY R. ETHERIDGE, JUN. 365 



in the last specimen, though by no means greatly curved, whilst 

 the bevel is at a very low angle. The measurements are : — 

 Granite: Length, 5in.; breadth, 2in.; thickness, ljin.; weight, lib. 

 Diorite : Length, 5Jin. ; breadth, 2 fin. ; thickness, If in. ; weight, 

 1ft). loz. 



A very typical specimen of this section is from the Collection of 

 the Mining and Geological Museum, consisting of a dark green, 

 fine-grained diorite (PL xxxi., figs. 1 and 2). It was originally 

 a transversely elongated weather-bitten pebble, which has been 

 reduced to the required dimensions both by partially rubbing at 

 the sides and chipping at the butt, which is square-headed, like 

 that of syenitic granite, already described. The cutting edge is 

 very narrow, and obtusely pointed, the bevelled surface being 

 small but beautifully smoothed off and partially polished. Length, 

 6in. ; breadth, 2in. ; thickness, lfin. ; weight, lib. 3oz. 



The largest example of this type is one kindly presented to the 

 Mining and Geological Museum by Dr. J. 0. Cox, an elongated 

 pebble of grey argillite, with an imperfect cleavage, which has 

 either been slightly ground all over and smoothed, or become so 

 from gentle attrition in a river bed. The butt is the narrower 

 end, and has been fractured. The anterior end is narrow, and 

 the cutting edge limited in extent, bluntly ground, with many of 

 the scratches, especially those in a transverse direction, remaining. 

 It seems probable that this stone w T as selected on account of a 

 certain small degree of curvature in the direction of its greatest 

 length, a circumstance also noticeable in the last tomahawk 

 described. Length, 8Jin. ; breadth, lfin. ; thickness, lfin. ; 

 weight, 1ft). 7oz. 



The last implement of this section is equally interesting from 

 the fact that it is quadrangular in section, the fissile nature of the 

 rock, a hornblende schist, apparently having been taken advantage 

 of to cleave, rather than chip, the weapon out of an irregular 

 fragment of rock. The cutting edge is narrow, but well rounded, 

 the well-polished bevel being only on two of the faces of the 

 roughly-shaped rhomb. Length, 4fin.; breadth, lfin.; thickness, 

 lfin. ; weight, 8oz. 



