240 Subclass Dipneusti, or Lung- 
India, Ceratodus latissimus, figured 
by Agassiz in 1838, being the best- 
known species. 
The abundance of the fossil teeth 
of Ceratodus renders the discovery of 
a living representative of the same 
type a matter of great interest. 
In 1870 the Barramunda of the 
rivers of Queensland was described 
Fig. 172.—Teeth of Ceratodus runcinatus Plie- 
ninger. Carboniferous. (After Zittel.) 
by Krefft, who recognized its rela- 
tionship to Ceratodus and gave it the 
name of Ceratodus forsteri. Later, 
generic differences were noticed, and 
it was separated as a distinct group 
by Castelnau in 1876, under the name 
of Neoceratodus (later called Epicera- 
todus by Teller). Neoceratodus forsteri 
and a second species, Neoceratodus mio- 
lepis, have been since very fully dis- 
cussed by Dr. Gunther and Dr. Krefft. 
Fig. 174 —Archipterygium of Neoceratodus 
Jorsteri Giinther, 
Ss 
hes 
Family Ceratodontide. (After Dean.) 
Australia, 
Fic. 173.—Neoceratodus forstert (Giinther). 
