DESCRIPTIONS OP PLATES. 231 



DESCRIPTIONS OF PLATES. 

 PLATE 8. 



FIG. 96. Young chorionic vesicle in situ, showing hydatiform degeneration of the stroma and syncytial budding. 



No. 836. X2.6. 



Fio. 97. Same, under greater enlargement, with the cyema in view. X3.75. 

 FIG. 98. Hydatiform degeneration. A small portion of No. 1189 still in loco. X4.5. 

 FIG. 99. Another portion of the same specimen. X22.5. 



FIG. 100. External appearance of an apparently normal conceptus, partly surrounded by decidua. No. 2077. X0.75. 

 FIG. 101. A portion of the same specimen, clearly showing hydatiform degeneration where in focus. The decidua 



is reflected. X3. 

 FIG. 102. Portion of villi from No. 690, showing numerous syncytial buds, absence of vessels, and glassy stroma. 



X37.5. 



FIG. 103. A chorionic vesicle showing shaggy appearance. No. 2258. XI. 5. 

 FIG. 104. Hydatiform villi from same specimen. X4.5. 

 FIG. 105. Macerated normal villi in blood clot. No. 640. X71. 

 FIG. 106. Well preserved, early hydatiform villi from the same specimen. X33.25. 

 FIG. 107. Hydatiform villi without marked epithelial proliferation. No. 7206. 



PLATE 9. 



FIG. 108. Hydatiform villi with pronounced epithelial proliferation. No. 7206, also shown in figure 107. X50. 

 FIG. 109. Hydatiform villi without (at left) and with marked epithelial proliferation (at right). No. 540. 

 FIG. 110. Fairly late stage in the degeneration of the villous vessels in hydatiform villi. No. 977. X50. 

 FIG. 111. A slightly later stage in the degeneration of the villous vessels. No. 516. 

 FIG. 112. Almost complete disappearance of the vessels. No. 8746. X50. 

 FIG. 113. Non-vascular, early hydatiform implanted villi. No. 396. X50. 



PLATE 10. 



FIG. 114. Portion of No. 435a, showing a small villus in the center with an extremely long syncytial bud. X50. 



FIG. 115. Framework of syncytium arising from the chorionic membrane and from the villi. No. 962<z. X50. 



FIG. 116. Apical trophoblastic nodule. No. 516. X6. 



FIG. 117. A portion of the ehorionic membrane from No. 714, showing decidedly sinuous epithelium. X50. 



FIG. 118. An early, non- vascular, hydatid villus from the same specimen, showing constrictions. X50. 



FIG. 119. Epithelial vesicles within the stroma. No. 872. X180. 



FIG. 120. Extremity of an epithelial vesicle within the stroma, same specimen. X300. 



PLATE 11. 



FIG. 121. Slight epithelial proliferation on markedly hydatiform villi. No. 134. X50. 



FIG. 122. Extremely marked epithelial proliferation on a small hydatiform villus with glassy stroma. No. 415. X95. 



FIG. 123. The disintegrating capillaries are represented merely by large, incomplete curved outlines. No. 749. X50. 



FIG. 124. Collapsed capillaries in process of obliteration. No. 712. X95. 



FIG. 125. Fenestrated, macerated, hydatiform villi among others which are quite fibrous. No. 651d. X50. 



FIG. 126. Villi showing only a trace of the capillaries. No. 651<7- X50. 



PLATE 12. 



FIG. 127. Section of a villus from No. 510, showing scattered Hofbauer cells. X300. 



FIG. 128. Section of a villus from No. 749, showing accumulation of Hofbauer cells, especially at the right. X50. 

 FIG. 129. A somewhat macerated normal embryo from a case of early hydatiform degeneration. No. 2099. X6. 

 FIG. 130. The chorionic vesicle of the same specimen, showing early hydatiform villi to left where in focus. X4. 

 FIG. 131. Basal area of No. 1260, showing pronounced hydatiform degeneration of the villi. XI. 

 FIG. 132. The same specimen, opened in the capsular region to show the presence of the cyema. Xl.l. 

 FIG. 133. Marked macerated and deformed fetus from the same case. X4. 



FIG. 134. Twin fetuses, No. 2250a and 6, a case of hydatiform degeneration. XI. (See also figs. 141 and 142, 

 plate 14.) 



