Mus"les, visceral and parietal, [155], [172]
Mus"les, veno-pericardial of Limulus and Scorpion, [177], [297], [309]
Muscle-spindles, [267]
Mygalidæ, stomach, [109]
Mygl"idæ, segmentation, [249], [306]
Myomeres, [262], [337], [414], [479]
Myotomes, [332], [337], [338], [391], [407], [408]
Mysis, eyes, [100]
My"is, ductless glands, [422]