SUB-CLASS V 



GANOIDET 



schiefer of Thuringia and Riechelsdorf, Hesse ; also found in the Upper 

 Permian of England, France, and Kussia. 



Elonichthys, Giebel (Ehahdolepis, Troschel ; Cosmoptijchms, Traquair), (Figs. 

 137, 138). Teeth of diflerent sizes. Fins large, with fulcra, and the rays 

 distally divided. Dorsal in front of the anal fin. Scales rhombic, obliquely 

 sculptured. E. germari, Gieb., from Coal Measures of Saxony. Other species 



Fig. 137. 



Elonichthys {Cosmoptychius) 

 striatus, Ag. sp. Scale troiu 

 outer (A), and inner (B) aspects, 

 three times uat. size. J.o^ver 

 Carboniferoirs ; Ediiiburgli 

 (alter Traqnair). 



Elonichthys (Rhabdolepis) macroptems, Bn.inn sp. Lower Permian (Roth- 

 liegendeii) ; Lebach, near Saarbriicken, Rlieiusli Prussia (restoration after 

 Agassizj. 



from the Carboniferous of England, Scotland, and North America ; also from 

 the Lower Permian of Rhenish Prussia and Bohemia. 



Acrolepis, Ag. Closely resembling Elonichthys, but scales more deeply over- 

 lapping. A. sedgwicki, Ag., from Upper Permian (Marl Slate of Durham and 

 Kupferschiefer of Germany). Other species in Carboni- 

 ferous of England, Scotland, and Belgium. 



Gyrolepis, Ag. (Fig. 139). Anterior va,ys of pectoral 

 fins not articulated. Operculum deep and narrow. Scales 

 marked with irregular oblique and curved rugae. Common 

 in the Muschelkalk and lihaetic Bone-bed, but usually 

 only isolated scales. 



Myriolepis, Egerton. Scales very small. M. darkei, 

 Eg., from Trias (Hawkesbury Formation), New South Wales. An allied fish 

 in the Coal Measures of Kilkenny, Ireland. 



Oxygnathus, Egerton {Thrissonotus, Cosmolepis, Egerton). Fins large, with 

 small fulcra. Pectoral fin rays only articulated distally. Dorsal in front of 

 anal fin. Scales small, but thick, obliquely sculptured. 0. ornafus, Eg., from 

 Lower Lias, Lyme Regis. 



Centrolepis, Egerton. Lower Lias ; Lyme Regis. 



Athersfonia, Sm. Woodw. Trias (Karoo Formation) ; Colesberg, South 

 Africa. 



Coccolepis, Ag. Scales thin, rounded, and very deeply overlapping ; orna- 

 mented with tubercles. Fulcra minute or absent. Dorsal in front of anal fin. 

 Small species in the Upper Jurassic Lithographic Stone of Bavaria (C. huch- 

 landi, Ag.), the Purbeck Beds and Lower Lias of England. A larger species 

 {C. australis, Sm. Woodw.) in the Hawkesbury- Wianamatta Formation of New 

 South Wales. Only known Palaeoniscid ranging above the Lias. 



Cryphiolepis, Traquair. Fins large, with fulcra. Scales large and thin, 



Fig. Vd9. 



Gyrolepis ortnitus, Gieb. 

 Scales enlarged. Miischel- 

 kallc ; Esperstadt (alter 

 Dames). 



