(90) 



ent. We have supposed its relationship to be with Stei-ctdia 

 Sno'ivli not onl}'^ because the latter already has a remarkable 

 biiobate form (var. disjunctd)^ but also because we can readily 

 imagine a leaf like the leaf of S. Snozuii shown on Fl. Dak. 

 Group, fl. jj. y. J with a deeper sinus which would then 

 make it correspond with our specimen. 



This reference is far from satisfactory ; it would seem that 

 if this is a variety of S. Snowii the latter ought to be present 

 as well or at least in the Raritan, although it has not as 3'et 

 been discovered, except a doubtful specimen from Tottenville, 

 Staten Island (Hollick, Ann. N. Y.Acad. Sci. 11 : 422. 

 i>i-37'f' 4' 1898). Although Lesquereux in his Report 

 on the Clay Deposits of New Jersey (1878) recognized un- 

 determined species of Stcrculia at three different localities, 

 no decisive remains of this genus have thus far come to light 

 in the Raritan formation in New Jersey. Dr. Hollick, to 

 whom a sketch of this leaf was sent, is disposed to compare 

 it with Fl. Dak. Group, ;pl. 21. f. 5, which Lesquereux 

 refers to Heer's Cissites formosus. Inasmuch as Lesquer- 

 eux's determination is doubtful, because the secondary system 

 is quite unlike that of Cissites in looping along the margins 

 and more like that of Sterculia^ I prefer to consider it more 

 nearly related to the latter, at least provisionally. It may also 

 be compared withy, j of Aralia concreta Lesq., as figured 

 by him in Cret. & Tert. Fl. fl. g. Stcrculia limhata "V'elen., 

 the Bohemian representative of S. Snowii^ has sometimes 

 4-lobed, 4-veined leaves. 



Sterculia mucronata Lesq. , PL 4J./. j. 



Stcrculia mucronata Lesq. Fl. Dak. Group, 182. fl. jo. 

 f. 1-4. 1892. 



In the absence of the apical and basal portions, and be- 

 cause of the obliteration of the venation, it is with consider- 

 able hesitation that I refer this small bilobed leaf to the above 

 Dakota Group species. That it is referable to Sterculia is I 

 think probable, but just which species to associate it with is 

 doubtful. It is about the same size as Lesquereux's smaller 



