Mesosigmoidea, definition of, [101]
in Macacus, [140]

Mesothelium, [21]

Metanephros, [24]

Midas geoffrei, ileo-colic junction and cæcum of, [214]
ursulus, ileo-colic junction and cæcum of, [214]

Midgut, [192]
extent of, [38]

Monodon, ileo-colic junction of, [209]

Monotremata, ileo-colic junction of, [204]

Monotreme, structure of penis, [26]

Monotremes, biliary ducts in, [145]