PLATE 2 
EXPLANATION OF FIGURES 
Fig. 12 A section through the shoulder region of individual Ext. Gr. C. 19 
slightly posterior to that shown in figure 11, showing the absence of the glenoid 
cavity and the ventral zone of the girdle (compare with fig. 7). 
Fig. 13 A section through the shoulder region of individual Ext. Gr. C. 25, 
showing the development of the suprascapula after the rudiments of all other 
parts ot the girdle had been removed (a-e X 3-8, text fig. ily 
Fig. 14 A section of individual S. B. 2, showing the presence of only a very 
fragmentary portion of the girdle which developed, along with the limb, from 
the transplantation of a small area oi cells taken from the dorsal portion of the 
limb dise of another embryo (text fig. 1, smaller of the two circles). 
Fig. 15 A section of individual Tr. 2/v 10, showing the girdle which developed 
in a heterotopic position from the transplantation, along with a portion of the 
limb mesoderm, of the ventral half of the girdle rudiment (a-e X 4-8, text 
fase): 
Fig. 16 A section of individual Tr. d/2 4, showing the shoulder girdle which 
developed in a heterotopic position from the transplantation of the dorsal half 
of the girdle rudiment along with a corresponding portion of the limb mesoderm 
(a-e X 1-4, text fig. 1). 
Fig. 17 A section from the shoulder region of individual E. Tr. Ext. 12 show- 
ing complete absence of the girdle, the rudiment of which was removed along 
with the limb mesoderm from the embryo in the stage of open medullary folds 
(text fig. 2). 
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