566 THE MICROSCOPE. 



reptiles in the Lower sand-stones of the New red system, 



Fig. 307. 



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

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

 tilage. 2, A small transverse section of the same, showing the gradual change 

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

 their characteristic canaliculi. 



in Warwickshire, have been placed beyond a doubt. By 



the microscope, the 

 supposed monarch, 

 of the Saurian tribes 

 the so-called Ba- 

 silosaurus has 

 been deposed, and 

 removed from the 

 head of the Eepti- 

 lium to the bottom 

 of the Mammifer- 

 ous class. The mi- 

 croscope has de- 

 graded the Sauroce- 

 phalus 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. 308. Microscopical character of Enchondroma, to the true affinities 

 from a finger. The cartilage undergoes a gradual f , < ,,.+,,, MP 

 change, and is seen converted into bone at the upper OI toe glgciutiu iVJtJ 



P rtion - gatherium ; and by 



