46 



Mayflies al)nuiided and the tiist musicians of tlie eartli appeared in 

 the form of Ortliopterans Avhicli. by means of tlieir shrilling organs, 

 enlivened the solitudes of the strange old Devonian forests with their 

 love calls and wooing notes. Among fishes, the Ganoids and Selachians, 



INDIANA 



at IKc Close c| 

 De voni nn limt. 



of which our gar-pikes, sturgeons and sharks are degenerate descendants, 

 reached the acme of their development; while gigantic species of Dip- 

 noans or lung-fishes, now only represented by the dog-fish or "John 

 A. Grindle," abminded in the bays and bayous about the ancient Genesee 

 flats. 



