276 PROCEEDINGS OF THE AMERICAN ACADEMY. 



EXPLANATION OF PLATE. 



The three figures are reproductions from photomicrographs taken by Mr. W. 

 C. Greene from sections of the skin of Anolis carolinensis Cuv. All figures are 

 magnified 200 diameters. 



Abbreviations. 



dr7n. Derma. och'ph. Oclirophore. 



e'drm. Epidermis. st.crn. Horny layer. 



mela'ph. Melanophore. st.muc. Mucous layer. 



Fig. 1. Section of a scute, perpendicular to its surface, from a piece of skin in 

 tlie brown state. Tlie branched processes of the nielanophores are 

 siiown filled with pigment out to the epidermis. 



Fig. 2. Tangential section of a scute from a piece of skin in the brown state. 



Fig. 3. Section of a scute, perpendicular to its surface, from a piece of skin in 

 the green state. The melanophore processes from which the pigment 

 has migrated proximally may be traced, even in the photograph, 

 almost to the epidermis. 



