48 THK MAM'KAt I I |:K cK TMK TKKU-W ATTA, 



4. THE EVIDENCE OF THE NUCLEI OR CORES. 



What constitutes a nucleus or core? The answer seems 

 simple enough : any piece of rock that remains after one or 

 more flakes were struck off represents a nucleus or core. 

 The study of the toro-watta has, however, shown that it is 

 not always easy to distinguish between a nucleus and an 

 unfinished reject, that is to say, a flake that was struck off 

 a parent block, but was not finished- Further, other speci- 

 mens have been found which conclusively prove that though 

 one or even more flakes were struck off, they cannot strictly 

 be considered as cores. These specimens were apparently 

 only tested as to the suitability of the rock. At Droughty 

 Point I found a siilendid specimen of tbis type, and a large 

 number of these remarkable specimens were found at De- 

 vonport, but the most interesting of all came from Shene. - 



There is no sharp, well-defined limit between nucleus, 

 pseudo nucleus, and unfinished, reject. They pass so imper- 

 ceptiblv into each other that it is often absolutely impos- 

 sible to decide which type a certain specimen represents. 

 On the other hand, if a large number is collected, there will 

 always be a few specimens which leave no doubt as to their 

 nature. 



I will, therefore, deal with the evidence of such speci- 

 mens only which leave no doubt as to their character, tak- 

 ins the nuclei or cores first- 



(A) NUCLEI. 



Though a number of specimens have come under my 

 notice which must unquestionably be considered as nuclei, 

 none is so convincing and absolutely certain as the Kemp- 

 ton nucleus (1). 



I found this specimen on the eastern slope of a hill 

 north of Kcmpton known as the Sistei'S, and I first dis- 

 covered, what we may now term the core, representing, ap- 

 parently, about half of a large water- worn pebble. I also 

 found 41 flakes which could all be fitted to the core, and 

 the most interesting of all was the last flake that was struck 

 off the core, of which I had previously made a cast. The 



il) Notes on a chlppod boulder found near Kenipton. Pn]). and 

 Proceed. Koy. Soc, Tas., 1908. 



