APIM.li \ll' - OK HKSRAKCIl 



of the hvhrnl- stii'lie.l in this research HI respect to it* 

 macroscopic nml nn< r-. opi. <-|ir found 



to o ilitTi-r from it* parents that w, re it not known to 

 be hybrid th.-r. would IK- amp!.- justification I" regard 

 it n- a -) /;>m<t. Part II). It is well known 



to tin' l"'tam-t that many <>f the hyhnd- included among 

 the hundreds! referred to by Fockc are an indnidualizcd 

 as to warrant their assignment * -: -iiU|>ecies. 



Finally, it mvin- from tin- pre-< nt -tat. <>( our knowl- 

 edge that tin- ditlirulty "f hybridisation, th> 

 to infertility f the offspring, tin- tendency to the develop 

 incut "f <har.nt.-t> in tin- hybrid in excess of parental ex- 

 trrm.-, iin.l thi- tfiiil.'iu \ to i|i- \.-lop new charactorH in tin- 

 hylirnl. >M>ur ii-u.i!!\ an HIM -r.-i- n-latin.-hi|) to tin- near- 

 Den of the par. in-, while the ! intcrtiieiliate- 

 new ln-ar* usually a ilimt n-liiti<>nslnp. Owmir. huw- 

 tr.inr |la-tinty cf protoplasm the moat 

 variaMe results in hyliniliTaition are to be expected, u 

 iu-ateil l-y the r.-iilt.- of thi- -tmliw of the starche*, 

 a- |!r.->.-nt.-il partu ularly in Tal.le II, 1'arU 1 to 26, and 

 summaries. 



The -tiidy of the s;eiieBi of species it without doubt 

 a stit>lv of the evolution of > hemiral compound*, and 

 essentially of int>-ra< lion*, rearrangements, and com- 

 binations of 8tereoohemir -\st.-in- an<l th'-ir i-onipon- 

 ents. In tho origin of - . h\hridi/ation there is, 



according to the conce[>tion 8tate<l in the ponultiin.ite 

 n, a union of two gtcreoisomeric systems of rary- 

 in>; ] . fmiale and male, in ea<-h of which there 



an assumed to be potentially tvery or practically every 

 character and chractor-ph*- of' the parent More- 



ihia varialiihty of plu-tinty applies not only to the 

 system, as a whole. l>ut alM> to <ii. nteffral stono- 



chrmii- tr \ ing extremely complex, plasti< 



t.-ra. tin.' nystems, and applying thereto a fundani 

 knowledge of physical cnemiMtry, especially of organic 

 eoll,.idn, M i in.|i.-.ite.|. it xcenvi that there should be 

 no more difficulty than in the P aim- sub- 



tancfi generally in reaching K;I un- 



.- of the diverae derelopmental changes that 

 .-. nr in the hyliri<l t!i:it in, why some characters are 

 like those of one or the other parent or Mh parents, or 

 n<) parental extreme*, or new character! 

 appear; or why one parent may be of equal or greater 

 |M>ten< v in influencing the development of the characters 

 of the hybrid ; or why species of remote genera cai 

 be crossed, or, on the other hand, why varieties of the 

 same species may readily be crossed ; or why characters 

 that may hare existed in ancestral generations, but which 

 are riot apparent in the parents, may appear in the off> 

 spring; or why there may or may not be Mendelian 

 inheritance; or why mutations can be induced arti- 

 ficially by the injection of certain substance* into the 

 ovaries, etc.. etc. rnfortunately thi* subject is so Tsst 

 that a detailed consideration of xuch point.- would take us 

 far beyond the possible limits of space of this report, and 

 th.-r. for.-, as previously stated, nothing more can be 

 offered at present than mere suggestions. 



