No. 1.] ORIGIN OF HUMAN MONSTERS. 61 
nancy were carefully described after numerous sections of 
them had been examined microscopically. I have excluded 
the reports of 82 of the specimens, for in them the tubes had 
ruptured before the operation. Of the 46 that remain the 
histories state that they were unruptured and vary from one 
to six centimeters in diameter. Two of the 46 contained 
normal embryos of the second month and five of them path- 
ological embryos. The rest, 39 in number, contained entire 
ova without embryos or simply villi of the chorion in various 
stages of degeneration. Usually the dilated tube was found 
filled with blood through which were scattered villi, the 
chorion rarely being intact, that is, encircling the ccelom. 
The chorion had collapsed, leaving scattered villi, which were 
“degenerated,” “poorly formed,” or “necrotic,” in different 
cases. Usually, it is stated in the record, “‘scattered villi were 
found in the clot; no embryo was found.” 
The normal embryos need not be discussed more than to 
mention that the amnion was very small, as is usually the 
case in these specimens. The pathological specimens, how- 
ever, are of the same nature and degree of degeneration as 
those found in the specimens obtained from the uterus. A 
number of small specimens which were cut into serial sections 
contained no embryos at all; they are included among the 39 
mentioned above. From my experience in searching for em- 
bryos in pathological ova I am of the opinion that a few 
more pathological embryos would have been found had the 
specimens been examined with greater care. It is unlikely 
that more normal embryos would have been found, for in all 
cases they lie in a ccelom or an amnion filled with a clear 
fluid. I have never found a normal embryo in an ovum which 
did not contain a cavity well marked by a sharp wall and 
filled with a transparent fluid, and therefore think it unlikely 
that those who made the sections for microscopical examina- 
tion overlooked any normal embryos. 
From my records not over seven per cent of uterine 
pregnancies contain pathological embryos and were the pri- 
mary cause which produces them located in the germ we 
