Archive image from page 155 of The development of the chick;. The development of the chick; an introduction to embryology . developmentofchi00lill Year: 1908 136 THE DEVELOPMENT OF THE CHICK lenc. Me ten c. f— Fig. 73. — Entire embryo of 20 s, viewed as a transparent object from above. The cranial flexure and the rotation of the head of the embryo have made considerable progress. A. o. m., Omphalo-mesenteric artery. Cr. Fl., Cranial flexure. D. C, Duct of Cuvier. Dienc, Diencephalon. Mesenc, Mesencephalon. Metenc, Metencepha- lon. Myele

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Archive image from page 155 of The development of the chick;. The development of the chick; an introduction to embryology . developmentofchi00lill Year: 1908 136 THE DEVELOPMENT OF THE CHICK lenc. Me ten c. f— Fig. 73. — Entire embryo of 20 s, viewed as a transparent object from above. The cranial flexure and the rotation of the head of the embryo have made considerable progress. A. o. m., Omphalo-mesenteric artery. Cr. Fl., Cranial flexure. D. C, Duct of Cuvier. Dienc, Diencephalon. Mesenc, Mesencephalon. Metenc, Metencepha- lon. Myelenc. 1, and 2, Anterior and posterior divisions of the myelencepha- lon. Telenc, Telencephalon. Vel. tr., Velum transversum. Other abbrevia- tions as before, x 30. cent to and surrounding the embryo, and a choriogenous zone, comprising the remainder. The method of formation of amnion and chorion is as follows:

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