124 THE SHORTER SCIENTIFIC PAPERS 



Jennings, H. S. 



'11. Pure Lines in the Study of Genetics in Lower Organisms. Am. Nat., 

 Vol. 45, pp. 79-89. 



Jennings, H. S. 



*12. Assortative Mating, Variability and Inheritance of Size in the Conjugation 

 of Paramecium. Joiirn. Exp. Zool., Vol. 11, No. 1, pp. 1-134. 



Jennings, H. S. 



'13. The Effect of Conjugation in Paramecium. Journ. Exp. Zoo/., Vol. 14, 

 No. 3, pp. 279-391. 



Kellogg, V. L. 



'06. Variation in Parthenogenetic Insects. Science, Vol. 24, pp. 695-698. 



Lutz, F. 



'08. Variation in Bees. Biol. Bull., Vol. 6, pp. 217-219. 



MacDougal, Vail and ShuU. 



'07. Mutations, Variations and Relationships of the CEnotheras. Carnegie Inst. 

 Pub. No. 81. 



MacCurdy and Castle. 



'07. Selection and Cross Breeding in Relationship to the Inheritance of Coat- 

 Pigment and Coat Patterns in Rats and Guinea Pigs. Carnegie Inst. Pub. 

 No. 70. 



Minot, C. S. 



'08. The Problems of Age, Growth, and Death. Putnam and Sons, New York. 



Moenkhaus, W. J. 



'11. The Effects of Inbreeding and Selection on the Fertility Vigor and Sex 

 Ratio of Drosophila ampclophila. Journ. Morph., pp. 122-154. 



Nageli, C. 



'84. Mechanisch-physiologische Theorie der Abstammungslehre. Miinchen. 



Pearl, R. 



'07. A Biometrical Study of Conjugation in Paramecium. Biometrika, Vol. 

 5, pp. 213-297. 



Pearl and Clawson. 



'07. Variation and Correlation in the Crayfish. Carnegie Pub. No. 64. 



Pearl and Surface. 



'09. Is there a Cumulative Effect of Selection? Zeit. f. indtikt. Abstam'm. u. 

 Vererb., Bd. 11, H. 4. 



Pearson, Wright and Lee. 



'07. A Cooperative Study of Queens, Drones and Workers in Vespa vulgaris. 

 Biometrika, Vol. 5, pp. 407-422. 



Strasburger, E. 



'84. Neue Untersuchungen iiber die Befruchtungsvorgange bei den Phanero- 

 gamen als Grundlage fiir eine Theorie der Zeugung. Jena. 



Spillman, W. J. 



'10. Notes on Heredity and Evolution. Am. Nat., pp. 75 0-762. 



Walton, L. B. 



'08. The Variability of the Zygospores of Spirogyra and its bearing on the 

 Theory of Amphimixis. Science, p. 907. (Notes based on the first in- 

 vestigations in connection with the present paper.) 



Walton, L. B. 



'12. Amphimixis, Variability and Death; Some Facts and a Theory. Science, 

 Vol. 3 5, pp. 93 5-940. 



