THE DENTAL TISSUES. 73 



spaces, clustered together and usually most abundant at a 

 little distance below the surface, are often to be seen, parti- 

 cularly if the section has been made from a brownish, im- 

 perfectly developed tooth. 



These spaces have a ragged outline, furnished with short 

 pointed processes, and in favourably-prepared sections it 

 may be seen that their outlines are formed by portions of 

 the surfaces of closely opposed spheres, and globular con- 

 tours may often be detected in the solid dentine near to 

 them, as is seen in the accompanying figure, taken from a 

 section boiled in wax in order to render it very transparent. 



Although these large spaces are very common, they are 

 perhaps not to be regarded as perfectly normal, but are 



Fm. 34 



rather indications of an arrested development at that spot. 

 The occurrence of globular forms during the early stages 

 of calcification, will again be alluded to in connection with 

 the development of teeth ; but although the term " inter- 



(*) Interglobular spaces in dentine. 



