272 BIBLIOGRAPHY 



RIDDLE, O., 1912. Preliminary Chemical Studies on Male and 

 Female Producing Eggs of Pigeons. Science, XXXV. 



RIDDLE, 0., and A. A. SPOHN, 1912. On a Relation found to exist 

 between Changes in the Chemical Composition of a Membrane 

 and Changes in its Permeability. Science, XXXV. 



SAUNDERS, E. R., 1911. Further Experiments on the Inheritance of 

 "Doubleness" and Other Characters in Stocks. Jour. Genet., I. 



SAUNDERS, E. R., 1911. Studies in the Inheritance of Doubleness 

 in Flowers. I. Petunia. Jour. Genet., I. 



SCHLEIP, W., 1911. Variation, Hereditat, Bastardierung, De- 

 scendenzlehre. Jahrb. u. d. For. d. Anat. u. Entwtschr. 

 Gesch., XVI. 



SCHLEIP, W., 1912. Geschlechtsbestimmende Ursachen im Tier- 

 reich. Ergeb. und Fortschr. der Zool., III. 



SCHULTZE, 0., 1902. Was lehren uns Beobachtung und Experi- 

 ment iiber die Ursachen mannlichen und weiblicher Ge- 

 schlechtsbildung, etc. ? Sitz.-ber. der Phys.-med. Gesell. Wurz- 

 burg. 



SCHULTZE, 0., 1903. Zur Frage von den geschlechtsbildenden 

 Ursachen. Arch. mikr. Anat., LXIII. 



SEILER, J., 1913. Das Verhaltung der Geschlechtschromosomen 

 bei Lepidopteren. Zool. Anz., XLI. 



SELIGMANN, C. G., 1906. Proc. Zool. Soc. Lond., II., p. 903. 



SHEARER, C., 1911. The Problem of Sex-Determination in Di- 

 nophilus gyrociliatus. Jour. Marine Biol. Ass., IX. 



SHEARER, C., 1912. The Problem of Sex-Determination in Di- 

 nophilus gyrociliatus. Q. J. M. S., LVII. 



SHEARER, C., and D. J. LLOYD, 1913. On Methods of Producing 

 Artificial Parthenogenesis in Echinus esculentus, etc. 

 Q. J. M. S., LVIII. 



SHEARER, C., W. DE MORGAN, and\ H. M. FUCHS, 1911. Prelimi- 

 nary Notice on the Experimental Hybridization of Echinoids. 

 Jour. Marine Biol. Ass., IX. 



SHEARER, C., W. DE MORGAN, and H. M. FUCHS, 1912. On 

 Paternal Characters in Echinoid Hybrids. Q. J. M. S., LVIII. 



SHULL, A. F., 1910. Studies in the Life Cycle of Hydatina senta. 

 Jour. Exp. Zool, VIII. 



SHULL, A. F., 1910. The Artificial Production of the Partheno- 



