Classification of mammals, [142]

Classification of man, [146]

Classification by old authors, [37]

Classification of vertebrates, [143]

Clergy as critics of science, [236]

Clericalism, [239], [284]

Clodd, E., [90], [127]

Cœlenterata, [42], [96]

Cœlomata, [43], [44]

Commissions, royal, [195], [204]