Xo. 475] 



REVISION OF COMPTONIA 



503 



interval of midrib. I altogether fail to see any but the'niost (general 

 resemblances. 



With regard to the relations of Compfmiia driiaiulruldcs to the 

 other fossil species of Comptonia the following points niav i)e men- 



The lobes are of the form of schrankii but much larger and the 

 leaves as a whole are comparatively less elongated. There is 

 somewhat of a resemblance to the typical acutiloba leaves but the 

 size is greater and the lobes are longer and incurved. The leaves 

 of a'ninxjensis have similar lobes when they are deeply lobed, i)ut 

 the leaf as a whole is smaller and the incisions never seem to reach 

 the midrib as they do in driiandwidcs. Ileer's arcntira { rludn- 

 bonensis) is intermediate in form between this species and tcnitt- 

 gensis. Ludwig's incisa also includes very similar leaves which 

 have, however, narrower, less inctu'ved, and nioiv rect.niuulaily 

 placed lobes. ^Yhether this species spread from (ireece to -lapaii 

 or from Japan to Greece r/a southern Asia is problcmarical. bin ii 

 was probably more plentiful throuirhout parts of M.inlwn, A^a 

 an.l on the hills of the incipient Ilin.alavas than the fo^iN iii,|icat.'. 

 The leaf from British Cclun.lna uhieh DauMU, ivfenvd n- Cnmi.- 



^hape J xhv Inlu.^. ' It i. M..iieuhat Mualler than Vn'j,vv\ type 

 material of dri/andmidrs hut is identical with lh(> -lananese h'af 

 refened here.' DauMUi s.y> p. M : '-Allied uith unnujnisis 

 Ileer, nhiusilnha P,rntii:n.. an.l dniondrnidrs Tiiu-. all of wliich nuiy 

 be varieties ..f ,,ne .pe.-ie..- To a nnujcsls I fail to see any 

 resemblance excej)! in the tip which is a variable character of little 

 weight. What Dawson means by nhfu.s'iloha Brouirn. I have not 

 been al)le to make out. 



