LIFE 



423 



/huh they were, perhaps, the ancestors. Like lung-fishes, they 

 apprar to have been near their climax at this time, though they 

 livi-il on till the Cretaceous. Sharks, now chiefly marine, seem to 

 lived in the open sea in the Devonian period, but their remains 



Fig. 371. A partial restoration of Coccosteus dccipiens; from the Old Red Sand- 

 :>ne of Scotland. About Y* natural si-/,e. (After Woodward.) 



Kip. 372. Dlplmts Valenciennes I, restoration by Traquair; from the Old Red 

 sandstone, North Scotland; about r /5 natural size. 



