Monopterus, [597];

M. javanensis, head, skull, pectoral arch, vertebrae, [598]

Moon-eyes, [553]

Moon-fish, [579]

Morchellium, [88];

M. argus, stomach, [88]

Mordacia, [426]

Morgan, [11] n., [20], [21] n., [31] n., [32]

Moringua, [601]

Mormyridae, [549], [544], [154];