Anatomy of Teratological Seedlings. IV. 471 
previously described, but both exhibit features of some interest and will be 
described in detail. The first seedling (Figs. 6 a, 6 b) exhibits no striking 
anatomical peculiarity in either the cotyledons or petioles, except that the 
vascular bundles are smaller and more feebly differentiated in the reduced 
member (Figs. 47, 48). This difference in size is faithfully reflected in the 
hypocotyl (Fig. 49), though the transition is normal until the base of the 
hypocotyl is approached. In this region the intercotyledonary xylems 
appear to lose their protoxylem and unite with the xylem from the midrib 
