Regeneration of nerves, [469]
Reptiles, dominance of, [21]
Retina, compound, [71]
Ret"ia, development of, [101]
Ret"ia, inversion of, in Vertebrates, [114]
Ret"ia, inverted, [70]
Ret"ia, layers of compound, [73]
Ret"ia, lay"rs of in Crustacean eye, [100]
Ret"ia, of lateral eye of Ammocœtes, [93], [95], [111]
Ret"ia, Musca, [89]