PLATE 11 
EXPLANATION OF FIGURES 
80 to 84 A series of five sections from specimen No. 226. The sections are cut 
almost transversely to the long axes of the embryos, that is, parallel to the surface 
of the mucosa (see text for descriptions). Figures 80 to 81, X 46; figures 82 to 83, 
X 42; and figure 84, x 37. 
