iii 
LIST OF PLATLS AND JLLUSTRATlUNS. 
Plate A. — Vertical Section of Hill near Croafonl, at foot of which is the Railway Ballast Quarry. 
Plate B. — Horizontal Section of Railway Ballast Quarry near Gosford. 
Plate I. — GosfjaUa. 
Plate II. — dos/urdia and M ijriolepis. 
Plate HI. — M Ijriolepis and Dictijopyge. 
Plate IV. — Apateolepis and Diclijopyoe. 
Plato V. — Prist isom us. 
Plate YI.-—Prisliso)ims, Semionolus, Peltopleurus, PhoHdophorns, Ac. 
Plate VII. — Cleitlu'olepis. 
Plate VIII. — P rislisomus, Cleithrolepis, Belonorhynchus. 
Plate IX. — Pelonorhynchus. 
Plate X. — Do. 
Woodcut — Restoration of Cleithrolepis. 
