Metanephros, [389]

Metasoma, [52], [387], [411]

Metastoma, [239], [246], [272], [289], [342], [458]

Metazoa, [444], [459], [471], [472]

Meynert's bundle, [48], [77]

Mollusca, dominance of, [23]

Mouth, old, or palæostoma, [14], [317], [322], [440], [458]

Mo"th, vertebrate, [317]

Muco-cartilage, v. Cartilage

Muscles, antagonistic, [447]