Verte"rates, branchial organs, [151]
Verte"rates, cœlomic cavities in head region, [251], [266]
Verte"rates, cranium, evolution of, [342]
Verte"rates, egg of, [483]
Verte"rates, evolution of, [11]
Verte"rates, excretory organs, [389], [391], [408]
Verte"rates, glands, ductless, [418]
Verte"rates, gla"ds, internal secretion of, [215]
Verte"rates, heart, [175], [179], [180]
Verte"rates, muscles, evidence of segmentation of eye, [248]