706 THE MICROSCOPE. 



reptiles in the Lower sandstones of the Is r ew red system, 



Fig. 337. 

 1, Section of the tendo-Achillis as it joins the oscalcis ; showing the stellate 

 cells of tendon gradually coalescing to form the round or oval cells of the 

 cartilage. 2, A small transverse section of enchondroma, showing the gradual 

 change of the cartilage-cells at a into the true bone-cells, termed lacuna, 

 at &. with their characteristic eanalieuli. 



in Warwickshire, have been placed beyond a doubt. By 



the microscope, the 

 supposed monarch 

 of theSaurian tribes 

 — the so-called Ba- 

 silosaums — has 

 been deposed, and 

 removed from the 

 head of the Repti- 

 lian to the bottom 

 of the Mammalian 

 division. The mi- 

 croscope has de- 

 graded the Sau7'0- 

 cephalus from the 

 class of reptiles to 

 that of fishes. It 

 has settled the 

 doubts entertained 

 by some of the 

 highest authorities 

 in palaeontology as 



Fig. 39&>— Nkroscopical character of Enchondroma, *° * ne ^ rue affinities 

 fi-.majinger. The cartilage undergoes a gra- of the cdo-antic Me- 

 cu.il change, and is^seen converted into bone ,, P ° , , 



at the «pper portion. gatnerium ; and by 



