ORDER GANOIDEI. 



99 



described under the names of Cyclurus and Notceus ; and it also 

 occurs in the Eocene of Colorado and Wyoming, where it has been 

 described as Prota?nia and Hypamia. The Eocenes of the latter 

 district and of Rheims have also yielded the allied Pappichthys, 



Fig. 929. — Leptolepis sprattiforDiis ; from the Kimeridgian of Bohemia. 

 Letters as in fig. 928. 



in which there is but a single row of teeth ; and members of this 

 family may occur in the Chalk of the Lebanon. 



Incertve Sedis. — The remarkable genus Dorypterus^ of the Per- 

 mian of Hesse and Durham, may be conveniently noticed here, since 

 its position is very problematical. In this remarkable fish the body 

 is shaped somewhat like that of a Sunfish, and the anterior part of 

 the dorsal fin is taller than the whole depth of the body. There 

 are, moreover, the Ganoid characters of fulcra to the fins, and the 

 notochordal condition of the vertebral column ; but, on the other 

 hand, there are no ganoid scales, and the pelvic fins are placed in 

 advance of the pectorals, as in some of the Teleostei. On account 

 of this curious combination of characters, Professor Cope has pro- 

 posed to make Dorypterus the type of a special order, the Dory- 

 copteri, with the family Dorypteridce. 



