508 INTRODUCTION TO CYTOLOGY 



Plough, H. H. 1917. Jour. Exp. Zool. 24: 147-210. 9 figs. 



1921. Jour. E.xp. Zool. 32: 197-202. 3 figs. [Temperature and crossing-over.] 

 Plough, H. H., and P. T. Ives. 1932. Proc. 6 Internal. Cong. Genet. 2: 156-158. 

 Plowe, J. Q. 1931a. Protoplasma 12: 196-220. illus. [Membranes.] 



19316. Protoplasma 12 : 221-240. [Membranes.] 

 PoDDUBNAJA, V. 1927. Planta 4 : 284-298. illus. [Composite.] 

 PoiRAULT, G. 1893. Ann. Sci. Nat. Bot. VII 18: 113-256. 43 figs. 

 PoLicARD, A. 1912. Compt. Rend. Soc. Biol. Paris 72 : 228-230. [Chondriosomes.] 

 PoLicARD, A., and G. Mangenot. 1922. Compt. Rend. Acad. Sci. Paris 174: 

 645-647. 



1923a6. Compt. Rend. Acad. Sci. Paris 176: 1841-1844; 177: 346-348. [Oil.] 

 PoLiTis, I. 1914a. Atti Inst. Bot. Univ. Pa via II 14: 335-361. pis. 13-15. 

 Poljansky, G., and G. Petruschewsky. 1929. Arch. Protist. 67: 11-45. illus. 

 Pollack, H. 1928. Biol. Bull. 56: 383-385. [pH in amoeba.] 

 PoLLisTER, A. W. 1930. Jour. Morphol. Physiol. 49: 455-507. illus. [Gerris.] 



1932. Science 75: 390-391. [Centriole.] 

 Poole, C. F. 1931. Univ. Calif. Publ. Agr. Sci. 6: 169-200. illus. [Crepis.\ 



1932. Univ. Calif. Publ. Agr. Sci. 6: 231-255. illus. [Crepis hybrid.] 

 PoPA, G. T. 1927. Biol. Bull. 52 : 238-257. illus. [Spermatozoon.] 

 PoPOFF, M. 1906. Anat. Anz. 29: 249-258. 4 figs. [Chromidia.] 



1907a. Arch. Protist. 1: suppl. 44-82. [Chromidia.] 



19075. Arch. Mikr. Anat. 70: 43-129. pis. 4-8. [Chromidia.] 



1908. Zeitschr. Wiss. Zool. 89 : 487-524. illus. 



1910. Festschr. f. R. Hertwig. Jena. 19-48. pis. 4^6. [Chromidia.] 



1916. Biol. Centralbl. 36: 175-191. illus. [Stimulation of somatic cells.] 



1922. Jahrb. Univ. Sofia 19: II. [Stimulation of somatic cells.] 

 1931. Die Zellstimulation. Berlin. 



Popovici, H. 1925. Compt. Rend. Acad. Sci., Paris 181: 126-128. [Oils.] 

 Portier, P. 1917. Compt. Rend. Acad. Sci. Paris 165 : 267-269. 



1918. Les Symbiotes. Paris. 

 Prat, S. 1925. Arch. Protist. 52: 142-165. illus. [Cyanophycea;.] 

 Pratje, A. 1920. Biol. Zentralbl. 40: 88-112. [Chemistry of nucleus.] 

 Prell, H. 1923a. Genetica 6: 177-190. 4 figs. [Rhegmatypy.] 



19236. Genetica 5: 191-208. 8 figs. [Apomixis.] 

 Preston, R. D. 1931. Proc. Leeds Phil. Soc. 2: 185-195. illus. [Valonia wall.] 

 Prevost et Dumas. 1824. Ann. Sci. Nat. Bot. 1: 1, 167; 2: 100, 129. 

 Priestley, J. H. 1921. New Phytol. 20: 17-29. [Suberin and cutin.] 

 Pringsheim, N. 1854. Untersunchungen liber Bau und Bildung der Pflanzenzelle. 

 Berlin. 



1855, 1856. Monatsber. Kgl. Akad. Wiss. Berlin. [Syngamy in algse.] 

 Prowazek, S. 1905. Arb. Kais. Gesundheitsamt 21. [Plasmodiophora.] 

 Prywer, C. 1931. Acta Soc. Bot. Polon. 8: 19-46. illus. [Beta.] 

 PuNNETT, R. C. 1927. Mendelism. 7th ed. London. 

 Py, G. 1929. Compt. Rend. Soc. Biol. Paris 101: 919-921. illus. 



Q 



QuisuMBiNG, E. 1925. Bot. Gazette 80 : 439-449. illus. [Plasmodesms.] 



R 



Rabl, C. 1885. Morphol. Jahrb. 10: 214-330. pis. 7-13. 5 figs. 

 Raciborski, M. 1893. Anz. Akad. Wiss. Krakau, p. 259. [Elaioplasts.] 



