. Principles of zoölogy : touching the structure, development, distribution, and natural arrangement of the races of animals, living and extinct with numerous illustrations : Part 1, Comparative physiology : for the use of schools and colleges. Fig. 149. 876. If the eggs are examined by the microscope, eachone is found to contain a small, pear-shaped body, whichis the embryo, (e,) surrounded by a transparent escaping from the egg, the little animal has an oblongform, with a constriction at the base. This constrictionbecoming deeper and deeper forms a pedicle, {j),) whichsoon divides
. Principles of zoölogy : touching the structure, development, distribution, and natural arrangement of the races of animals, living and extinct with numerous illustrations : Part 1, Comparative physiology : for the use of schools and colleges. Fig. 149. 876. If the eggs are examined by the microscope, eachone is found to contain a small, pear-shaped body, whichis the embryo, (e,) surrounded by a transparent escaping from the egg, the little animal has an oblongform, with a constriction at the base. This constrictionbecoming deeper and deeper forms a pedicle, {j),) whichsoon divides into three lobes. The disk also assumes a pen-tagonal form, with five double series of vesicle?. The firstrudiments of the rays are seen to form in the interior of thepentagon. At the same time, the peduncle contracts stillmore, being at last entirely absorbed into the cavity of th©body, and the animal soon acquires its final form, (m.) METAMOlirilOSES OF ANIMALS. 179.
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