Mackie, Mr. J. S., researches of, [858].

Macleay, Mr., on trilobites, [534], [540].

M’Coy, Prof. F., works and researches of, [252], [275], [321], [524], [532], [534], [576], [514].

Macropoma Mantelli, [620].

Macrura, [515].

Madrepora, [253], [264].

Maestricht, [265], [269], [274], [346], [411], [515], [705], [730].

---------- chalk, [25].

Magnesian limestone series, [30].

--------- limestones of Matlock, [878].