Talk:Paper - The Borderland of Embryology and Pathology

Fig. 1 - Diagrammatic mid-line section of frog gastrula, showing invagination of tissue at dorsal lip of blastopore.

Fig. 2 - Well differentiated lung tissue with bronchi and alveoli, 2 weeks after intracerebral transplantation of lung rudiment of a 6 mm. rat embryo.

Fig. 3 - Well differentiated stomach and pancreas 2 weeks after intracerebral transplantation of rudiments of these organs ofa 6mm. ratembryo.

Fig.4 - Lens and retinaltissue4weeksafterintracerebraltrans- plantationofeye rudimentofa 10mm. ratembryo.

Fig. 5 - Diagram of Spemann's experimental produc- tion of anterior duplication of newt embryo by ligature of blastula vertically through the blastopore.

Fig. 6 - A digit in a retroperitoneal teratoma. AB is bilobar skin-covered eminence which projected into cyst cavity from pedicle X; NI, a well-formed nail at end of digit. The X-ray photograph shows the phalanges and metacarpal, and also several nondescript bones in the main mass. (Specimen has been de- scribedfullybyGale& Willis16).

Figure 6 is reproduced with the kind permission of the Editor of the Jour- nal of Pathology and Bacteriology.

Fig. 7 - Undifferentiated embryonic epithelium-like tissue, a fre- quent component of malignant teratomas.