EXTINCT ANIMALS 



Fig. 183. — Outline drawing of the extinct fish Pterichthys 

 from, the Devonian or Old Red Sandstone strata. A 

 dorsal (34), ventral (35) and lateral view (36) are given. 

 The various bony plates are numbered. The scaly body 

 with dorsal fin and tail fin is shown. Note also the 

 lateral leg-like anterior fins. The round orbits (4) are 

 seen in Fig. 34 and the mouth in 35 between the plates 

 2 and 3. (After Traquair.) 



the examination of a great number of specimens 

 from Canada as well as Scotland a ver}^ detailed 



254 



