GANOIDEI. 



371 



First Family — Catukid^-e. 



Notoclwrd persistent, ivith partially ossified vertehrce ; homo- 

 cereal ; fins with fulcra. Teeth in a single series, small, pointed. 



d 



Fig. 148. — Caturus furoatus (Solenhofen). 



Extinct. Caturus from the Oolite to the Chalk. 



Second Family — LeptolepidjE. 



Scales cycloid. Vertehrce ossified ; homocercal ; fins without 

 fulcra ; dorsal short. Teeth minute, in hands, with canines in 

 front. 



Extiact, and leading to the living representative of this 

 suborder. Thrissops with the dorsal iin placed far backwards, 

 and opposite to the long anal. Leptolepis with the dorsal fin 



Fig. 149. — Leptolepis sprattiforniis. 



opposite to the ventrals, from the Lias and Oolite. These 

 fishes, as far as the preserved parts are concerned, cannot be 

 distinguished from Teleosteous fishes, to which they are 

 referred by some Palseontologists. 



Third Family — ^AMiroiE. 

 Skeleton entirely ossified ; a single large gular plate ; homo- 



