Vol. X] VON GELDERN—SKIN OF ANOLIS CAROLINENSIS 89 



which average about fifty in number for each scale. The spaces 

 between the scales are transparent and contain many branching 

 pigment cells (Fig. 6 A). By reflected light these scales appear 

 emerald green and the interspaces black (Fig. 6 B). The internal 

 surface appears blue by reflected light and the branching melano- 

 phores appear distinct and dark brown or black (Fig. 6 C). 



The external surface of the scales of the ventral surface appears 

 a pale straw color by transmitted light and contains isolated indis- 

 tinct pale brown melanophores of from four to twelve in number. 

 The branches of these melanophores become darker near their 

 termination (Fig. 7 A). By reflected light the scales appear some- 

 what as inverted glass cups containing crushed ice and the melano- 

 phores are cobalt blue except at the termination of their branches 

 which are brown (Fig. 7 B). The internal surface by transmitted 

 light appears a pale straw color and the melanophores are distinct 

 and black (Fig. 7 C). 



The scales along the mid-dorsal stripe differ from those just 

 described in that, irrespective of other colors, they have a peculiar 

 pinkish cast while the melanophores are much fewer in nvunber in 

 many scales and lighter in color than those previously described. 



The scales of the throat-fan are pale straw color by reflected 

 light and show the blue appearing melanophores. The wide 

 spaces between the scales present many bright red linear streaks of 

 varying sizes which branch and anastomose. The underlying color 

 is pink and of granular appearance. -^By transmitted light the 

 melanophores appear brown and more distinct and the spaces 

 between the scales take on an orange color. Injections of india ink 

 into the circulation would tend to show that the pink color is not 

 entirely due to the vascularity of this structure but to some other 

 coloring matter present. 



It would appear from the differences noted by reflected and 

 transmitted light that the melanophores are separated from the 

 surface of the scale by some substance which gives them a bluish 

 cast by reflected light and pale brown by transmitted light. That 

 they themselves are black is evident by viewing them from the 

 internal surface of the scale where they present a sharp clear out- 

 line (Fig. 6 A, B and C). In order to explain the green color of the 

 scales of the lateral aspect of the body it is necessary to eliminate 

 the yellow coloring matter which is noted by transmitted light. 

 This may easily be accomplished by subjecting the skin to alcohol 

 and ether in which this yellow substance readily dissolves. When 



