Publisher's Synopsis
Excerpt from The Journal of Experimental Zoölogy, Vol. 1: The Journal of Experimental Zoology, Baltimore
The egg of Dentalium, like that of Cerebratulus, possesses certain features by means of which the axis may be determined in the living egg from the moment of its release from the ovary. The egg is more or less deeply pigmented, perfectly opaque, and of a color that varies in diflerent individuals from light olivaceous to reddish brown or almost brick red. When first set free the egg is somewhat irregular, but quickly becomes more rounded. It is then seen to be very considerably flattened, so as often to be almost biscuit-shaped, one side being always more flattened than the other, and often more or less irregular in contour. Viewed by reflected light the central region of each of the flat tened sides is seen to be occupied by a very distinct, though vaguely bounded, white area, nearly or quite free from pigment (fig. 1) these areas, as shown by the subsequent development, correspond with the two poles of the egg, and the more flattened side, which.
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