82 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



with their small size. The latter is no doubt due to the 

 fact that flint is only found in the Isle of Man in the form 

 of small nodules washed out of the boulder-clay, and it is 

 noticeable that all the Neolithic floors known are on 

 actual deposits of boulder-clay, so as to be close to where 

 the flints naturally occur. 



A very few implements of similar character to those 

 mentioned above have been found formed of quartzite, 

 and even of slate. 



Of other materials are some almost un worked 

 pounders, crushers, or hammer-stones, whetstones for 

 grinding and polishing implements, and perhaps some of 

 the spindle-whorls occasionally met with. The polished 

 stone weapons, hammers and axes, or celts, are probably 

 all of foreign make, as shown by the material, such as 

 ophic-calcite, of which they are composed, and which is 

 not found here in situ. It is moreover impossible to say 

 with certainty whether such implements reached these 

 parts in the Stone Age or later, for bronze being at all 

 times much more costly and rare, stone no doubt con- 

 tinued long in use, so as to cause considerable over- 

 lapping of the periods. 



Although some of the more primitive coarse, heavy, 

 and unornamented examples of pottery, not turned by 

 wheel, which have been exposed by agricultural opera- 

 tions, may have belonged to food vessels of this period, it 

 is difficult to discriminate them from those of a later date, 

 and our opinion must be guided by their surroundings and 

 associations. 



One or two small and very rudely formed dug-out 

 canoes (fig. 7) seem to belong to this period. The one now 

 in Castle Rushen was found at Tosaby, St. Marks. The 

 most perfect example met with is that found in 1884, at 

 Ballakaighan, Oerman (figs. 7 and 8). It measured just 



