Definitions

from The Century Dictionary and Cyclopedia

  • n. The cellwall of an ovum; the vitelline membrane; in ornithology, the egg-pod.

Etymologies

Sorry, no etymologies found.

Examples

  • The wasp larva, as soon as it emerges from the egg-membrane, finds fresh and palatable food before its very nose, and at once begins to eat.

    The Dawn of Reason or, Mental Traits in the Lower Animals

  • The egg-membrane now bursts, before any internal organ, or even any tissue, except the cells of the cutaneous layer, is formed.

    Facts and Arguments for Darwin

  • In Cassidina also the first larval skin without appendages is easily detected; it is destitute of the long tail, but is strongly bent in the egg, as in Ligia, and consequently cannot be mistaken for an "inner egg-membrane."

    Facts and Arguments for Darwin

  • Philoscia, in which the larval skin is closely applied to the egg-membrane (Figure 38), and is only to be explained as the larval skin by a reference to Ligia and Cassidina.

    Facts and Arguments for Darwin

  • Valette's own statements; it appears never to be present before fecundation, attains its greatest development at a subsequent period of the ovular life, and the delicate canals which penetrate it do not even seem to be always present, indeed it seems to belong to the embryo rather than to the egg-membrane.

    Facts and Arguments for Darwin

  • The young animal might be called a Nauplius; but essentially there is nothing but a rough copy of a Nauplius-skin, almost like a new egg-membrane, within which the Mysis is developed.

    Facts and Arguments for Darwin

  • But the outer egg-membrane passes over the "micropylar apparatus" of the

    Facts and Arguments for Darwin

  • Caprella.) a peculiar structure makes its appearance very early on the anterior part of the back, by which the embryo is attached to the "inner egg-membrane," and which has been called the "micropylar apparatus," but improperly as it seems to me.

    Facts and Arguments for Darwin

  • I have never been able to convince myself that the so-called "inner egg-membrane" is really of this nature, and not perhaps the earliest larva skin, not formed until after impregnation, as might be supposed with reference to Ligia, Cassidina and Philoscia.)

    Facts and Arguments for Darwin

  • * (* Little as a name may actually affect the facts, we ought certainly to confine the name "micropyle" to canals of the egg-membrane, which serve for the entrance of the semen.

    Facts and Arguments for Darwin

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