Fig. 28. — Photomicrograph from section No. 101. Zeiss Apochromat. 10 mm., 

 proj. occ, No. 4, X 100 diam. A coagulated cresceutic mass containing a 

 coarse network of parallel fibrin threads stretches across the field. 



Fig. 29. — Photomicrograph from section No. 210 

 oil. imm., 2 mm., proj. occ, No. 4, X 1000 diam 

 cells, in the center one with karyokinetic figure. 



Fig. 30. — Pliotomicrograph from section No. 18fi 

 oil. imm., 2 mm., proj. occ, No. 4, X 1000 diam. 

 syncytium shown on the free order running like a polar axis from A to B 

 (The photomicrographs were prepared under the author's direction by Mr 

 Frank T. Harmon.) 



Zeiss Apochromat. hoin. 

 A group of trophoblast 



Zeiss Apochromat., hoin. 

 Cuticle and rods of the 



