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EXPLANATION OF PLATE XIV 
Fig. io. Section through everted labella in the plane where the tip 
of the axial apophysis (q) first appears. The approximate 
extent of the petiolated blades is shown in dotted lines. 
x 570 . 
Fig. 11.- Section through everted labella in the plane where the base 
of the axial apophysis (q) becomes fused to the tooth-pb^ 
(£) and where the labial gutter (V 1 ) and the dorsal hooked 
sclerites (/•) first appear. x 570. 
