NORTH STAFFORDSHIRE COAL FOSSILS. 233 



GENUS DENDROPTYCHIUS, HUXLEY. (Ref., Quar. Jour. 

 Geol. Soc., vol. xxii., p. 601.) 



We have a number of head bones, scales, and 

 other parts which we refer to this genus. There 

 are many points requiring further elucidation before 

 the distinctive characteristics of this genus, as given by Dr. 

 Young (op. cit.)j can be finally established. 



Position and locality : Deep mine ironstone, Longton. 

 GENUS DIPLOPTERUS, AGASSIZ. 



Diplopterus carbonarius, Agassiz. (Ref., Poiss. Foss., 

 vol. ii., p. 162.) Scales and head bones of a fish which 

 we refer to this species have occurred at Norton and 

 Adderley Green. They are small rhomboidal scales covered 

 with ganoine. The surface is finely punctured. We are 

 inclined to think that this species was founded from imper- 

 fect materials, and that in reality it is only the young of 

 Megalichthys. 



Position and locality : Hard mine coal shale, Adderley 

 Green, Norton. 



FAMILY GLYPTODIPTERINI, HUXLEY. 

 GENUS HOLOPTYCHIUS, AGASSIZ (RHIZODUS, OWEN.) 



Rhizodus (Holoptychius) Garneri, Murchison. This species 

 is mentioned by Agassiz in his " Tableau General," but has 

 not been described. It was discovered by Mr. Garner at 

 Kidsgrove, and was named after him. The type specimen is 

 lost, but the scale figured (see plate, fig. 4) is believed 



