I/O CHARLES G. ROGERS. 



must have some other path of communication between the optic 

 centers and the pigment cells of the skin than that furnished by 

 the brain and spinal cord. It might be possible that the skin itself 

 could furnish such a channel of communication, but a more 

 reasonable means would seem to be through the the sympathetic 

 nerves. In this our results agree with those of other observers. 

 There is also in the vicinity another variety of Dieinyctylns 

 viridescens known as miniatus. This is a land form and is of a 

 vermilion color. It possesses few or none of the black pigment 

 spots and apparently very few pigment cells. A series of experi- 

 ments was also carried out upon this form but in no case was 

 there any change of color noticed after section of the optic nerves. 



BIBLIOGRAPHY. 

 Carlton. 



Proc. Amer. Acad. Arts and Sci., XXXIX., No. 10, pp. 259-276. 

 Fischel. 



Arch. f. mikr. Anat., XLVI., pp. 719-748. 

 Flemming. 



Arch. f. mikr. Anat., XLVIII., pp. 690-692. 



