Melosaurus, [287]
Menobranchus lateralis, [132]
Menopoma, [97]
Mento-Meckelian cartilages, [30]
Meroblastic eggs; part of the egg only undergoes the process of cleavage, [53]
Merrem, on classification, [8]
Mesosauridae, [476]
Mesosaurus, [476];
M. tenuidens, [476]