THE JURASSIC PERIOD 



717 



Fig. 486. A Jurassic coelacanth, Undina gulo, a crossopterygian, about 

 tyr natural size; the outline of the air-bladder is shown just back of 

 the gills and under the axis. (Restored by A. Smith Woodward.) 



Fig. 



487. A Jurassic spookfish or chimaeroid, Squaloraja polyspondyla, 

 % natural size; from the Lower Lias, Dorsetshire. (Restored by A. 

 Smith Woodward.) 



Fig. 488. A Jurassic forerunner of the modern Amia, Eugnathus athosto- 

 mus, about 1 A natural size, from the Lower Lias, Dorsetshire. (A. Smith 

 Woodward.) 



