PLATE 2 
EXPLANATION OF FIGURES 
5 The glandular outgrowth has assumed a tubular form in a specimen 137 
mm. in length. Iron haematoxylin-orange G. X 900. 
6 Shows the change in form of a glandular outgrowth as based on a rotation 
of cells in an embryo 137 mm. in length. Iron haematoxylin-orange G. > 900. 
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