3IO CHARLES ALBERT SHULL. 



LITERATURE CITED. 



Bateson, W. 



'94 Materials for the Study of Variation. London, 1894. 



Emmel, V. E. 



'04 The Regeneration of Lost Parts in the Lobster. Thirty-fifth Annual Report 

 of the Commissioners of Inland Fisheries of Rhode Island, pp. 81-117, 1904. 

 '08 The Experimental Control of Asymmetry at Different Stages in the Develop- 

 ment of the Lobster. Jour, of Exp. Zool., pp. 471-484, 1908. 

 Haseman, J. D. 



'07 The Direction of Differentiation in Regenerating Crustacean Appendages. 



Archiv fiir Entwicklungsmechanik der Organismen, pp. 617-637, 1907. 

 Herrick, F. H. 



'95 The American Lobster. Bull, of U. S. Fish Comm., 1895. 



Hay, W. P. 



'95 The Crawfishes of the State of Indiana. Twentieth Ann. Report of the 



Indiana Dept. of Geol. and Natural Resources, pp. 475-507, 1895. 

 Moenkhaus, W. J. 



'03 An Extra Pair of Appendages Modified for Copulatory Purposes in Cambarus 



virilis. Indiana Univ. Bull., Vol. I., No. 4, pp. 17-18, 1903. 

 Morgan, T. H. 



'98 Regeneration and Liability to Injury. Zool. Bull., I., 1898. 



'oo P'urther Experiments on the Regeneration of the Appendages of the Hermit 



Crab. Anat. Anz., XVII., 1900. 

 Steele, M. I. 



'04 Regeneration of Crayfish Appendages. Univ. of Mo. Studies, Vol. II., 



No. 4, 1904. 

 Zeleny, C. 



'05 The Regeneration of a Double Chela in the Fiddler Crab (Gelasimus 

 pugilator) in Place of a Normal Single One. Biol. Bull., Vol. IX., pp. 152- 

 155. I905- 



