No. 475] 



REVISION OF COMPTONIA 



515 



to that size and form of leaf figured by Brongniart. Both Ettings- 

 hausen and Heer, partially follownl hy Scliiinpcr, ((insider the 

 leaves referred to the various species in the fore^oiiii^ syiioiiyiuy, 

 as identical and they compare them with tlie leaves of tlie living 

 Dryandra formosa R. Br, They exclude them from Comptonia 

 because of their thick midrib, acute lobes, and coriaceous texture, 

 exactly the characters in numerous instances of the yoimg leaves 

 near the growing tips in the existing Comptonia. I do not think 

 that there can be any doubt regarding the identity of these fossil 

 forms and I fail to see any characters which weigh against their 

 reference to Comptonia unless it be their comparatively greater 

 length. Some of the forms are characteristically those of Comp- 

 tonia, e. g., some of the leaves from Monte Promina and Hiiring, 

 which also form a transition series toward Comptonia diformc; and 

 these leaves gradually vary to the slender and acutely lobed forms. 

 If comparisons are made with a large enough series of leaves of 

 the existing species, many resemblances will at once become 

 apparent, especially as reinarked, to the slender, coriaceous, 

 thick-veined leaves of the tips of shoots. The latter are not 

 usually acutely lobed but often have that appearance in leaves 

 not completely unfolded, or in herbarium specimens in which tiie 

 lobes have become somewhat involuted in drying, as they usually 

 do. In this condition they are indistinguishable from the fossil 

 specimens. The American leaf of Les(|uereux whicli is included 

 in this species is less incised than the foreipi forms and ha- 

 rounded lobes. It is connected witli the more typical leaves l)y 

 the form described by Web. l^- Wes^. fn. ni liluiii-ii Pru->^ia. 

 Engelhardt in his " Tertiarflora Je>uitenuial.en> l.ei Kuii.hatitz 

 in Xordbohmen"' figures what he considers catkins of Myrica. 

 His figures look much more like leaves of this sj)ecies, however, 

 than they do like catkins. 



Comptonia vindobonensis : Kttings.) Berry 



Dnjanilrn rindnhnru „si^ i'ttinir... T.rt. FJ. r. Wim. p. 18, pi. 3, fig. 6, 



Dryandrnidr.^ coucinnn Heer, Fl. Tert. Ihlv., vol. 3, p. 188, pi. 153, fig. 

 S-10, 1859. 



' Nova Acta Leap. Carol., vol. 48, no. 3, pi. 8, fig. 10, 11, 1885. 



