"Mouthless" Quotes from Famous Books
 ... pupae of these animals. The pupae, indeed, cannot at all be regarded as members of an original developmental series, the individual stages of which represent permanent ancestral states, for an animal like the mouthless and footless pupa of the Silkworm, enclosed by a thick cocoon, can never have formed the final, sexually ...
— Facts and Arguments for Darwin • Fritz Muller |
