246 



DIPNOI 



compound nature is lost in recent Dipnoi ; but in the early fossils 

 the ridges are set with conical tubercles (Fig. 210a); and in 



3 — 



+5 . u. o 

 fi|l 





E-g §1 



■g S -" >. 



some, such as Uronemus and perhaps Oorichopoma (Traquair [458]), 

 the separate conical teeth are not fused even in the adult. Much 



