21 

 FIG. 13. 

 «a. COMMON CHOPPER, WITH WELL -FOKMEU 

 POLLICAL AND CHIPPED INDICAL FACE. 



Geilston. 

 The next figure shows a more discoidal tonn. 



FIG. 14, 14a, 14b. 

 Eb. DISCOIDAL CHOPPER, W^ITH PAKTiCULAK- 

 LY FLAT POLLICAL FACE ; INDiCAL FACE, 

 WELL CHIPPED; TRIMMED AND WORKED 

 ALL ROUND. Maryvale (Tea Tree). 

 Fig. 14, Indical face. Fig. 14a, Poliical face. Jb'ig. 

 14b, side view. 



When of a more elongate form, oval-shaped imple- 

 ments are produced which gradually pass by decrease in 

 thickness, either into lamellifoi-m Archseolithes of group 

 D, or into cultelliform types of group F. A fine speci.- 

 men is represented in fig. 15- 



FIG io. 

 Ec. OVAL CHOPPER, WITH ELABORATELY CMiJ:'- 

 PED INDICAL FACE. Found by Mrs. Oid- 

 meadow, Woodlands, Helton Mowbray. 

 The oval form gi-adually leads of over to more quadri- 

 lateral specimens, of which the following is the most 

 ■characteristic type. 



FIG. 16. 



Ed. QUADRILATERAL CHOPPER. ELABORATE- 

 LY WORKED. Melton Mowbray. 

 The next type, the trapezoidal shape, also evolves 

 from the elongate forms- 



FIG. 17, 17a, 17b. 

 Ee. TRAPEZOIDAL CHOPPER. ELABORATELY 

 WORKED. Maryvale (Tea Tree). 



Fig. 17, Indical face. Fig 17a, Poliical face. Fig 

 17b, side view. 



If the former type is carried to its extreme by con- 

 tinuing the two longitudinal edges till they intersect, the 

 triangular forms result, of which as many as nine or ten 

 varieties have been distinguished. I select only two of 

 the most characteristic forms. 



