ILLUSTRATIONS 



KIO. 



XV 



PAOB 



97. Experimentally'produced placenta of pseudo-pregnant rabbit - - 375 



98. Part of an earl}' human chorionic villus - . 397 



99. Early blastocyst of rabbit ----... 495 



100. Formation of the amnion in the rabbit - - - 413 



101. Foetal membranes of horse - ----- 413 



102. Diagram to illustrate the three parts of the wall of the yolk-sac (rabbit) 416 



103. Diagram of an opossum embryo and its appendages - - . 417 



104. Diagram showing the arrangement of fcetal membranes in />/./////* . 418 



105. Diagram showing the arrangement of foetal membranes in Peraimh* - 419 



106. Elongated blastocyst of sheep at thirteenth day of pregnancy - - 420 



107. Transverse section through blastocyst of sheep at twenty-fifth day - 4-JI 



108. Blastodermic vesicle of rabbit . . . 422 



109. Diagram of blastodermic vesicle of rabbit in longitudinal section - - 423 



1 10. Diagram to illustrate foetal membranes of Ei-innc* u* - . 425 



111. Hypothetical section of human ovum embedded in decidua - - 426 



112. Portion of injected chorion of pig - ... 427 



113. Section through wall of uterus and blastocyst of pig at twentieth day 



of pregnancy . . 428 



114. Diagram representing a stage in the formation of the placenta (pig) - 4-_".i 



115. Section through uterine and embryonic parts of a cotyledon of sheep 



at twentieth day of pregnancy - . 430 



116. Section through base of foetal villus, etc. (sheep) - . 431 



117. Columnar trophoblast-cells from the base of fo?tal villus at third month 



of pregnancy (cow) to show phagocytosis . 433 



118. Histology of the placenta in the cow and sheep - 43.") 



119. First stage of cellular secretion in placenta of cow - 437 



120. Ingestion and disintegration of red blood corpuscles by trophoblast of 



sheep 4:i!i 



121. Absorption of " Stabchen" by trophoblast of sheep - 441 



122. The uterine mucosa of dog at about twenty -third day of pregnancy 44.'? 



123. Ovum with zonary band of villi - . 44.~> 



124. The angioplasmode of dog at thirtieth day of pregnancy - - 446 



125. The labyrinth and green border of placenta of dog at fortieth day of 



pregnancy 447 



126. Transverse section of a four days' gestation sac of rabbit - 451 



127. Transverse section of a seven days' gestation sac of rabbit 4.VJ 



128. Section through uterine mucosa of rabbit pregnant about eighteen days - 4o.'-f 



129. Thickened ectoderm in rabbit, attached to placental lobe - - 4.">4 



130. Iron granules in placenta of rabbit at eighteenth day of pregnancy }.">:) 



131. (ilycogenic areas of rabbit's placenta at twelfth day of pregnancy 461 



132. Inversion of germinal layers in blastodermic vesicle of mouse - - 4Hs 



133. Longitudinal section of implantation cavity of field-mouse about eighth 



day of pregnancy 4i,<.) 



134. Longitudinal section of uterus and implantation cavity of guinea-pig 47'- 



135. Blastodermic vesicle of guinea-pig, showing inversion of germinal layers 473 



136. Implantation cavity of guinea-pig - 474 



137. Implantation cavity of guinea-pig - 47"> 



138. Allantoidean diplo-trophoblast of Er'nmi-i u.-- - 477 



139. Section in situ of ovum of Erin - 47"- 



140. The extension of yolk-sac against lacunar trophoblast in Ei //"" \i- J7 1 ' 



141. Transverse section through uterus of Sor?x at a stage when the bl.i 



cysts are still in the oviducts - 480 



142. Part of the anti-mesometrial wall of the uterus of &>/ J^J 



143. Uterus and embryo of Sore.v 4 *>.'> 



144. Orifice of uterine gland of mole with trophoblastic dome - 



145. Replacement of omphaloidean by allantoidean placenta 4^. 



146. Placenta of bat - - 



