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VIII. Mathematical Contribution.^ to the Theory of Evolution. —TX. On the 
Principle of Eomotypods. and its Relation to Hereditip to the Variability of 
the Individual, and to that of the Race. Part T.— Homotypo.sis in the 
Veyetable Kingdom. 
Bv Kael Peaesox. F.R.S., 
With the as.shtance of Alice Lee, D.Sc., Eexest Wareex, D.Sc., Agxes Fey, 
C^iCELY D. Fawcett, B.Sc., and other.<i. 
Tiooeived October 6,—Eead November 15, 1900. 
Contexts. 
I. IXTROEIT'TORY. 
(1.) Oeneral Scope of Memoir; Coirelation of nndifferentiated like Organs. 
Page 
286 
IT. Theory. 
(2.) Oiscnssion of the Pelation of Fraternal Correlation to tlie Correlation of nndifferentiated 
like Organs. . . . 
288 
III. OB.SERVATIOX. Measurement of Variability and Correlation of undiffei’entiated like Organs in 
the Individual. 
(.3.) Methods of selecting and collecting Material. . 291 
(I.) Statistical processes emjdoyed in reduction of Material. ... 292 
(5.) Terminology adopted: llomotijpes and Iloinotiipom . . _ 29.3 
IV. Actual Data. 
Section I. —(6.) Leaves of Trees. 
(7.) A. The Aish—Buckinghamshire, Dorsetshire, and Monmouthshire Series . . . . 
(8.) PI. The Spani.sh Chestnut—Buckinghamshire and Mixed Series. 
(9.) C. The Beech—Buckingham.shire Series. 
(10.) D. The Holly—Somersetshire and Dorsetshire Series. . . . 
Section II.—(11.) Segmentation of Seed-vessels of Plants. 
(12.) A. The Wild Poppy (Pajxirer rlKead )—Buckinghamshire and Somersetshii’c Series 
B. The Shirley Poppy—Chelsea and Great Hampden Series. 
(13.) C. Xigdla HisjKinica —Slough Series. 
(II.) Mulva llofundifolia —Great Hampden Series. 
Section HI.—Members of Whorls. 
(15.) "Woodruff {Aspenda odorata )—Buckinghamshire Series. . 
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12,11.1901. 
