23 



rrffif ulty in distinguishing the extreme types of both 

 groups. If the thickness increases, the knives merge into 

 group Eg. In fact, it is very cluncult to keep groups Eg. 

 and Fa. separate. 



The knives have another peculiarity ; they may be 

 termed the typical "ridged" Archaiolithes, because one 

 group sliow^s a single longitudinal ridge on tiie Indical 

 side, formed by two faces sloping from it towards the 

 edges ; the other group shows two such ridges, and it is 

 plain that they have been produced by splitting off the 

 single median ridge. I therefox'e divide the knives into 

 two sections, viz., (1) with a single more or less median 

 longitudinal ridge ; (2) with two more lateral longitudinal 

 ridges. 



A peculiar group of the knives are those which tei'- 

 minate in a very acute point; perhaps it would be advis- 

 able to separate this group from the knives altogether, 

 because this kind of implements probably served as borers 

 and not as cutting tools; but for the present 1 tina it 

 impossible to carry out this separation. On the other 

 hand, the knives with rounded ends are well distinguish- 

 able from those with one, or even two, pointed ends. 



From the large number of specimens I select only the 

 following : — 



FIG. 21. 



Fl/a. TYPICAL SPECIMEN OF A ONE-RIDGED 



KNIFE. Native Quarry:- Shene (Pontville). 



The next figure represents a good illustration of a 

 pointed knife, though there are others which exhibit a 

 sharper point still. 



FIG 22, 22a, 22b. 

 Fl/b. POINTED KNIFE. Shene (Pontville). 



Fig. 22, Indical face. Fig. 22a, Pollical face, i^'ig. 

 22b, side view. 



Among the one-i'idged knives, with rounded end, the 

 following specimen takes the foremost place ; m fact, ic 

 is one of the finest and most complete specimens that have 

 ever come to my notice, and I am greatly indebted to Mrs. 

 Oldmeadow for having kindly given me this specimen. 



FIG. 23, 23a, 23b. 



Fl/g. ONE-RIDGED KNIFE, ROUNDED OFl AT 



BOTH ENDS. Woodlands, Melton Mowbray. 



Found by Mrs. Oldmeadow. 



The next specimen is a good illustration of a two- 

 ridged knife. It seems that the two-ridged knives were 



