Illustrations xxi 



FIGURB PAGE 



101. Human Placenta at Full Term. Double 



Injection. One-half Natural Size. (From 

 Minot) '. . 310 



102. Human Embryo of 2.6 mm. (From Minot, 



after His) .311 



103. Human Embryo at the End of the Seventh 



Week. (From Kollmann) . . . .313 



104. Human Fetus at the End of the Fourth 



Month. (From Kollmann) . . .315 



105. Human Fetus of Six Months. (From Koll- 



mann . . . . . . . .317 



106-117. A Series of Figures Illustrating the De- 

 velopment of the External Genitalia in the 

 Human Fetus. (From Kollmann) . 319-20 



118. Figure to Illustrate the "Vertex-breech" 

 Method of Measuring Human Embryos. 

 (Altered from Kollmann) . . . .324 



