70 EXTINCT MONSTERS 



to the delight of all geologists. Certain specimens have been 

 obtained, from the Lias of England and Germany, that show 

 faithful impressions of the skin that covered the paddles. A 



FIG. 11. Head of Ichthyosaurus platyodon. 



specimen of this nature has been presented to the national 

 treasure-house at South Kensington by Mr. Montagu Browne. 



FIG. 12. Ichthyosaurus tenuirostris, from Wiirtemberg. (Fraas.) 



On the inner side of the paddle was a broad fin-like expansion, 

 admirably adapted to obtain the full advantage of the stroke of 

 the limb in swimming. 



