136 VARIATION AND DIFFERENTIATION IN CERATOPHYLLUM. 



Pearson, K. 



•02 On the systematic fitting of curves to observations and measurements. Biomet- 

 rika, vol. i, pp. 265-303, and vol. ii, pp. 1-23. 1902. 



:03. Cooperative investigations on plants. II. Variation and correlation in lesser 

 celandine from divers localities. Biometrika, vol. ii, pp. 145-164. 1903. 



-.04. On the laws of inheritance in man. II. On the inheritance of the mental and 

 moral characters in man, and its comparison with the inheritance of the physical 

 characters. Biometrika, vol. iv, pp. 131-190. 1904. 



■Ma. On an elementary proof of Sheppard's formulae for correcting raw moments 

 and other allied points. Biometrika, vol. in, pp. 308-312. 1904. 



:05. Mathematical contributions to the theory of evolution. XIV. On the general 

 theory of skew correlation and nonlinear regression. Drapers' Company 

 Research Memoirs, Biometric series, ii, pp. 1-54. London, 1905. 

 Pearson, R., and Radford, M. 



•04. On differentiation and homotyposis in the leaves of Fa^us sylvatica. Biomet- 

 rika, vol. Ill, pp. 104-107. 1 pi. 1904. 

 Perrin, E. 



:04. Onsome dangers of extrapolation. Biometrika, vol. in, pp. 99-103. 1904. 

 Ptp'T"t»'R^ a T 



•.01. 'The plants of Western Lake Erie, with observations on their distribution. 

 Bull. U. S. Fish Commission 1901, pp. 57-79. 



•05. The biological relation of aquatic plants to the substratum. U. S. Fi.sh Com- 

 mission Report for 1903, pp. 483-526. 1905. 

 Ranke, K. E., und Greiner. 



•04 Das Fehlergesetz und seine Verallgemeinerungen durch Fechnerund Pearson. 

 Arch. f. Anthropol., N. F., Bd. II, pp. 295-331. 1904. 



SCHENCK, H, ^n ry, r . ^. 



'86. Die Biologic der Wassergewaechse. Bonn, 1886. pp. iv -f 162, Tafel i and ii. 



SCHIEFFERDECKER. 



:04. Symbiose. Sitzber. d. Niederrhein. Gesellsch. f. Natur- u. Heilk. zu Bonn. 

 Sitz. von 13 Juni, 1904. pp. 1-11. 



'37. Beitrage zurKenntnissderCeratophyllum. Linnasa, Bd. 11, pp. 513-542. 1837. 



Semon, R. . , , . , ^ , 1 



:04. Die Mneme als erhaltendes Prinzip im Wechsel des orgamschen Geschehens. 

 Leipzig (Engelmann), 1904. pp. xiv + 353. 



Shull, G. H. , ,. , n r ^ 



:02. A quantitative study of variation in the bracts, rays, and disk florets of Aster 

 shortii Hook., A . novae angliae L., A.pufiiceiis L., and A .prena7ithoides Muhl., 

 from Yellow Springs, Ohio. Amer. Nat., vol. xxxvi, pp. 111-152. 1902. 

 •04. Place-constants for Aster prenanthoides. Bot. Gazette, vol. 38, pp. 333-375. 



-.05. Stages in the development of StJ(m cictitcefolium. Carnegie Institution of 



Washington Publication No. 30, pp. 1-28 7pls. 1905. 

 ■fyha. Statistical comparisons of Onagra [Oenothera) lamarckiana with two of its 



mutants. (See Macdougal -.05, pp. 36-50). 

 Strasburger, E. „ , J , 1 • L 



•02 Ein Beitrao- zur Kenntniss von Ceratophyllum subinersum und phylogenetische 



Erorterungen. Jahrb. wiss. Bot., Bd.xxxvii, pp. 477-526. Taf. ix-xi. 1902. 

 Strasburger, E., Noll, A., Schenck, H., and Karsten, G. __. 



:05. LehrbuchderBotanik furHochschulen. 7th Auflage. Jena, 1905. pp. vm + 



598. 



TAMMES, T. , . ^ ■ ^ ^n Tr u J 



•03. Die Periodicitat morphologischer Erscheinungen bei den Pflanzen. Verhand. 

 Kon Akad. Wetensch. Amsterdam. Tweede Sectie. Deel. ix, No. 5. pp. 1- 

 148. 1 Taf. 



