442 .TAS. p. HILL. 



J?'lG. 29. — Porliou ot the allautoic placental area, sliowiug the sjncjtium 

 (pi. syn.) and the outer (placental) wall of allantois {all mes'.). X 230. 



Fig. 30. — Portion of the greatly degenerate syncytium outside the allantoic 

 placental area, showing the regeneration of the uterine epithelium, d. De- 

 tritus occupying gland lumen, ex. syn'. Degenerating syncytium, ffl. ep. 

 Gland epithelium, ffl. o. Opening of gland into uterine lumen. ;•. ep. Re- 

 generating uterine epithelium, x 230. 



Fig. 31. — Superficial portion of the syncytium {ex. syn'.) and the regenerated 

 uterine epithelium {r. ep.). X 520. 



Figs. 32, 33, and 34. — Sections illustrating certain appearances found at 

 the margin of the allantoic placental area (cf. text, pp. 424, 425). all. m. 

 Margin of allantois. all. mes'. Outer (placental) wall of allantois. c/i. eel". 

 Persistent chorionic ectoderm cells (?). sy?i. o. Lamellar outgrowth from 

 margin of allantoic placental syncytium. All X 230. 



Fig. 35. — Section through the urino-genital strand of Fig. 25, showing the 

 two allantoic btalks {all. s.) in the median pseudo-vaginal passage {med. p.). 

 c. bl. Blood coagulum. ur. Urethra, vag. I. Lateral vaginal canal. X 18. 



Fig. 36. — P. nasuta, new-born young, x nearly 8. 



