In 1916 the Whitwick, South Leicestershire, and Ellistown Collieries put down a boring near Ellistown Colliery in Leicestershire to prove the measures below the Deep or Roaster Coal. Early in the following year Professor W. W. Watts and I examined in detail the cores of this boring, and collected samples of the rocks and fossils from them. The rock-descriptions in the journal of the boring-foreman were checked and in many cases altered and enlarged by Professor Watts and myself after examining specimens in the laboratory, some of them in thin slices under the microscope. Mr. R. Bullen Newton, of the Natural History Museum, was good enough to name some of the fossils.