BIBLIOGRAPHY 273 



genetic and Sexual Phases of the Life Cycle of Hydatina sent a. 

 Am. Nat., XLIV. 

 Shull, A. F., 1911. Studies in the Life Cycle of Hydatina senta. 



II. Jour. Exp. Zool., X. 



Shull, A. F., 1912. Studies in the Life Cycle of Hydatina senta. 



III. Jour. Exp. Zool, XII. 



Shull, A. F., 1912. The Influence of Inbreeding on Vigor in Hy- 

 datina senta. Biol. Bull., XXIV. 

 Shull, G. H., 1908. The Composition of a Field of Maize. Am. 



Breeders' Assoc, IV. 

 Shull, G. H., 1909. The "Presence and Absence" Hypothesis. 



Am. Nat, XLIII. 

 Shull, G. H., 1909. A Pure Line Method in Corn Breeding. 



Am. Breed. Ass., V. 

 Shull, G. H., 1910. Hybridization Methods in Corn Breeding. 



Am. Breeders' Mag., I. 

 Shull, G. H., 1910. Inheritance of Sex in Lychnis. Bot. Gaz., 



XLIX. 

 Shull, G. H., 1911. Reversible Sex-mutants in Lychnis dioica. 



Bot. Gaz., LII. 

 Shull, G. H., 1912. " Genotypes," " Biotypes," " Pure Lines," and 



"Clones." Science, XXXV. 

 Shull, G. H., 1912. Hermaphrodite Females in Lychnis dioica. 



Science, XXXVI. 

 Smith, G., 1910. Studies in the Experimental Analysis of Sex. 



Parts 1 and 2. Q. J. M. S., LIV. 

 Smith, G., 1910. Studies in the Experimental Analysis of Sex. 



Parts 3 and 4. Q. J. M. S., LV. 

 Smith, G., 1911. Studies in the Experimental Analysis of Sex. 



Part 5. Q. J. M.S., LYI. 

 Smith, G., 1911. Studies in the Experimental Analysis of Sex. 



Part 6. Q. J. M. S., LVII. 

 Smith, G., 1911. Studies in the Experimental Analysis of Sex. 



Part 7. Q. J. M. S., LVII. 

 Spemann, H., 1895. Zur Entwicklung des Strongylus paradoxus. 



Zool. Jahrb. Anat. Abt., VIII. 

 Spillman, W. J., 1908. Spurious Allelomorphism. Results of 



Recent Investigations. Am. Nat., XLII. 



