Murchisonia bilineata, [430].

Mussel-band in the coal-measures, [414].

Mycetophila, [558].

Myliobatis micropleurus, [598].

Mylodon robustus, [800].

Mytilus, [407].

N.

Natica plicistria, [428].

Nautilidæ, [469].

Nautilus Deslongchampsii, [470].