I76 OSCAR RIDDLE. 



LITERATURE. 

 Studer, T. 



'73 Die Entwicklung der Feder, Inaug. -Dissert. (Philos.) Facult. Bern., 29, 

 p. 2, 1873. 

 Klee, R. 



'86 Bau und Entwicklung der Feder, Hallersche Zeitschr. f. Naturwiss., Bd. 59, 

 Heft 2, pp. 1 10-156, Taf. 18-20, 1886. 

 Davies, H. R. 



'89 Die Entwicklung der Feder und ihre Beziehungen zu andern Integument- 

 gebilden, Morph. Jahrb., Bd. 15, pp. 560-645, Taf. 23-26, 1889. 

 Dwight, Jonathan, Jr. 



'00 The Sequence of Plumages and Moults of the Passerine Birds of New York. 

 Ann. N. Y. Acad. Sci., Vol. XIII., No. I, pp. 73-360, 1900. 

 Cunningham, J. T. 



'03 Observations and Experiments on Japanese Long-tailed Fowls, Proc. Zool. 

 Soc. of London, 1903. 

 Riddle, 0. 



'07 A Study of Fundamental Bars in Feathers, Biol. Bull., Vol. XII., No. 3, 



Feb., 1907. 

 '08 The Genesis of Fault-bars in Feathers and the Cause of Alternation of Light 

 and Dark Fundamental Bars. (In Press, Biol. Bull., '08.) 

 Jones, Lynds. 



'07 The Development of Nestling Feathers, Lab. Bull. No. 13, Oberlin College, 

 1907 (Nov.?). 

 The Hull Laboratories of Experimental 

 Therapeutics and of Zoology, 

 The University of Chicago, 

 December, 1907. 



