184 THE FLORA OF THE DAKOTA GROUP. 



Tertiiirfl. v. Goliren, p. 29, PI. xni, Fig. 1), and S. Majolana Mass. (Massa- 

 longo Fl. Foss. Scnigall., PI. xx, Fig. 3), tlie nervation of tliese Tertiary 

 leaves being, however, different. The leaf shown in PI. XXXII, Fig. 1, is 

 deformed in a peculiar way. Its median lobe is shorter, rounded at apex, 

 and its secondaries are more distant and ramose.^ 



The leaf PI. XXXI, Fig. 2, is partly covered by very distinct round 

 or oval, even sometimes triangular dots, |°"" to 1°"" in diameter, a species 

 of Sphan-ia^ with two marginal prominent rings surrounding a small, central 

 areole (Fig. 2a, enlarged). It greatly resembles S. Bratmii Heer (Fl. Tert. 

 Helv., vol. 1, p. 14, PI. I, Figs. 2-2c, e). Though the species can not be 

 ide tilied, the generic reference is evident. 



Habitat: P^llsworth County, Kansas. Nos. 30a, 30g, 734, 742, etc., of 

 the museum of the University of Kansas; A. Wellington and E. P. West, 

 collectors. 



Sterculia Snowii var. disjxjncta, n. var. 

 PI. LVIII, Fig. 6. 



Leaf doubled by a division of the midrib from its base and in a verti- 

 cal direction into two bilobate leaves, each with two strong lateral nerves, 

 forking above the base and diverging, representing two lobate leaves with 

 long, lanceolate, acuminate lobes, separated by broad sinuses joined at the 

 base to the principal or median nerve which forms a short petiole for each 

 of the leaves. The secondaries, a few of which are observal)le upon the 

 leaf of the right side, are thin, parallel, oblique. 



Each part of the leaf of this remarkable fossil really represents a single 

 leaf cut, or parted, in two at the top of the midrib. 



This leaf is referable to .S'. Snowii (Pis. XXXII, XXXIII) as a mere 

 deformation or monstrosity of the species. The other (Fig. 2) is a defor- 

 mation of a ditterent kind, in which a leaf of the same species shows on one 

 side the lobe in its natural form and position, while on the other the lateral 

 lobe is rounded and curved to the median nerve. The examination of a 

 number (tf sj)ecimens of this sjjecies gives the means of referring to the normal 

 form a numlier of those peculiar variations. 



Habitat: Near Fort Harker, Kansas. No. 2745 of the U. S. National 

 Museum. 



' "Sterculia Snmvii is of the same type as S. limbata Veleu. (PI. buUai. Kreiile. pt. 2, PI. v, Figs. 

 'i-b; PI. VI, Vig. 1)." Note by Prof. Le8i|iieieux a Hlioit time before his death. — F. H. K. 

 ^Tliis species has hern uaiued Spluvria prohhinalica Kuowltoii. See ante, p. 23. 



