364 J- T. PATTERSON. 



PLATE II. 



FIG. n. Photomicrograph of a section of an irregular polygermal mass. X40. 



FIG. 12. Photomicrograph of a single embryo from mass shown in next figure. 

 Xi8o. 



FIG. 13. Photomicrograph of a longitudinal section of a flat, plate-like poly- 

 germal mass. X 40. 



FIG. 14. Photomicrograph of a spherical polygermal mass which is barren of 

 adipose tissue. X 40. 



