Skel"ton, evidence of the, [119]
Skel"ton, Limulus, cartilaginous, [126], [136]
Skel"ton, Lim"lus, mesosomatic, [137]
Skel"ton, Lim"lus, prosomatic, [142]
Skel"ton, Petromyzon, [125]
Skel"ton, Vertebrate, commencement of bony, [120], [121]
Skin, digestive power of cells of, in Ammocœtes, [58], [442]
Si"n, of Ammocœtes, [346]
Si"n, nerves of, [448]
Skull of dogfish, [123]