No. 1.] ORIGIN OF HUMAN MONSTERS. 73 
TABLE UW: 
VESICULAR FoRMS OF PATHOLOGICAL Ova. 
No. | Ovum. Vesicle. rae | Amnion. Chorion. 
| | 
mm. | mm. | days | 
1) 8x7 | 1.4x6 Formed |/Fibrous and partly covered 
with villi. 
304] 15K 7x6 2 of ‘Chorion normal, but decidua 
| infiltrated with leucocytes. 
158 Haao~ - | 2 . ‘Atrophic. Tubal pregnancy. 
143 | 25xIOo + \Normal. 
vibe (aie oe iy er Toye | At Partial |Covered partly with villi. 
396 7 DXaT: 50 2 Somewhat fibrous and invaded 
by syncytium. 
134 Re xeTy —| 3X0 33 7 Normal. Embryo infected 
| with mother’s blood. 
58|20xX 18 X12] 6 71 . .,./Pibrous: 
87| 24x 16x9 Dol 42 a8 Normal. 
2A eon x TOM Sala 2.0 Multiple Syncytium increased. 
78 | 36 X 33 X13 TOs nO 7 a ‘Atrophic. 
247|40X 40X17 Pes 2 Nearly normal. 
Gat || eS ©) 2 | yalpsias None |Some magma reticulé in coe- 
lom. 
130] 15 X10X6| 4x3x1.5| 14 a ‘Normal. See Table IV. 
12)3 17X14 2X1.5 2H i. Imbedded in pus. 
TSOL2OR 15 x TO} 8E-5 37 ai ‘Fibrous. In a mucoid mass 
rich in leucocytes. 
264|25X 20X15 2.5 58 * Fibrous. Few villi with pus. 
14 30 Tos - Thin and fibrous. No villi. 
147 | 30x 27 © 20) of 89 * ‘Very fibrous. Few villi. 
six weeks, during which time the vesicles grow from one to 
six millimeters in diameter. However, if we consider each 
millimeter in diameter as indicating a week in age, we again 
get into trouble when this is compared with an arrangement 
according to their ages as determined by their last menstrual 
periods. It seems to be safer to assume that the pathological 
changes in these specimens began during the first and second 
weeks of pregnancy, and that the chorion continued to grow 
while the vesicles within became larger in some cases and 
smaller in others. Had the changes in them begun as late as 
the third week, when the amnion is sufficiently developed to 
remain and continue to grow, entirely different specimens 
would have been obtained, as will be shown later on.* 
1The age of the embryos is given according to His. Since writing 
the above I have come to the conclusion that he has underestimated 
