BIBLIOGRAPHY 327 



Castle, W. E., and Wachter, W. L. 1924. Variations of linkage in rats and 



mice. Genetics. IX. 

 Chambers, R. 1912. A discussion of Cyclops viridis Jurine. Biol. Bull. XXII. 

 Champy, C. 1921. Changement experimental du sexe chez le Triton alpestris. 



Compt. rend. I'Acad. Sciences. CLXXII. 



1922. Etude experimentale sur les diflPerences sexuelles chez les Tri- 

 tons: changement de sexe experimental. Arch. d. morph. gen. et exper. 

 VIII. 



Chapin, C. C. 1917. A microscopic study of the reproductive system of 



foetal free-martins. Jour. Exp. Zool. XXIII. 

 Clausen, J. 1921. Studies in the collective species Viola tricolor L. I. II. Bot. 



Tidsskift. XXXVII. 



1924. Increase of chromosome numbers in Viola experimentally in- 

 duced by crossing. Ilereditas. V. 



Clausen, R. E., and Goodsfeed, T. H. 1916. Hereditary reaction-system 

 relations- — an extension of Mendelian concepts. Proc. Nat. Acad. Sc. II. 



1925, Interspecific hybridization in Nicotiana. II. A tetraploid gluti- 



nosa-tabacum hybrid, an experimental verification of Winge's hypothesis. 

 Genetics, X. 



Clausen, R.' E., and Mann, M. C. 1924. Inheritance in Nicotiana Tabacum 

 V. The occurrence of haploid plants in interspecific progenies. Proc. Nat. 

 Acad, Sc. X, 



Cleland, R. E. 1922, The reduction divisions in the pollen mother cells of 

 Oenothera franciscana. Am. Jour. Bot. IX. 



1924. Meiosis in pollen mother cells of Oenothera francis'cana sul- 



furea. Bot, Gaz. LXXVII. 



Collins, E. S. 1919, Sex segregation in the Bryophyta, Jour. Genet. VIII. 



1920. The genetics of sex in Funaria hygrometrica. Proc. Roy. Soc, 



XCI. 



1920. Inbreeding and crossbreeding in Crepis capillaris (L.) Wallr. 



Univ. Calif, Pub. Agri. Sc. II. 



Collins, J. L., and Mann, M. C. 1923, Interspecific hybrids in Crepis, II. 



A preliminary report on the results of hybridizing Crepis setosa Hall. 



with C. capillaris (L.) Wallr. and with C, biennis L. Genetics. VIII. 

 CoERENS, C. 1902. Tiber den Modus und den Zeitpunkt der Spaltung, etc. 



Bot. Zeit. LX. 



1909. Zur Kenntniss der Rolle von Kern und Plasma bei der Verer- 



bung. Zeit. Abst.-Vererb. II. 



1916. Tiber den Unterschied von tierischem und pflanzlichem Zwitter- 



tum. Biol. Centralb. XXXVI. 



— 1920. Die geschlechtliche Tendenz der Keimzellen gemischtgeschlechti- 

 ger Pflanzen. Zeit. f. Bot. XII. 



1921. Versuche bei Pflanzen das Geschlechtsverhaltnis zu verschieben. 



Hereditas, II. 



Crew, F. A. E. 1921, A description of certain abnormalities of the repro- 

 ductive system found in frogs, and a suggestion as to their possible signifi- 

 cance. Proc. Roy. Phys. Soc. Edinburgh. XX. 



1921, Sex-reversal in frogs and toads. A review of the recorded cases 



of abnormality of the reproductive system and an account of a breeding 

 experiment. Jour. Genet. XI. 



