12 SIR J. W. DAAVSON OX THE MESOZOIC FLOEAS OP 



2. Cycadaceœ. 



"WlLLIAMSONIA EECENTIOK, S. N. (Plate lY. Fig. 1.) 



strobile globular or roixnd-oval, about 3 centimetres in diameter, with numerous nar- 

 row curved pointed scales. 



This fruit, of which there are several specimens in the collections from Mill Creek, 

 resembles more nearly Williamsonia Blandfordii, Fiestmantel, from the Jurassic of India, than 

 anything else I have seen. 



3. Coniferce. 



The collections from Mill Creek are remarkably deficient in specimens of this 

 order. A number of slender branchlets, imperfectly preserved in coarse stone, might 

 be referred to the species Glyplostrohus gradllimvs of Lesquereux, which also occurs in 

 the Dunvegan group. Peace River, but which is very doubtfully referable to the genus 

 Glyplostrobus. They might with just as much probability be referred to Taxodium, and as 

 no fruit was found, it will probably be best to await the collection of additional specimens. 



4. Dicotylédones. 

 Alnites insignis ? Dawson. 



Trans. Roy. Soc. Can., Vol. I. Sec. IV. p. 28, PI. VIII. 



Specimens, unfortunately very imperfect, in the collections from the North Fork of 

 Old Man River, resemble the above species, which was found at Nanaimo, Vancouver 

 Island, in the Upper Cretaceous. If not the same, they belong to an allied form. 



PLAT.4.NUS Heeri, Lesquercux. 



Lesquereux, Cretaceous Flora, p. *70, I'l. IX. 



" Leaf rounded, bluntly three-lobed, margin entire or undulate, obliquely wedge-form 

 toward petiole, and extending along it." Principal veins diverging at angles of 40" to 45°. 



This is a species of the Dakota group. 



Collected by T. C. W. at Mill Creek. 



Platanus affinis, Lesq. (Plate IV. Fig. 2.) 



Leaf sub-coriaceous, round-hexagonal in outline, rounded margins narrowing in an 

 angle to the petiole. Margin undulate or distantly dentate, venation pinnate, craspedo- 

 drome, central veins few, at a somewhat acute angle (about 35°). Lateral veins distant 

 from margin, giving off curved craspedodrome veinlets to margin.' 



This well marked species is ec[ually characteristic of the Patoot series in G-reenland 

 and of the Dakota in the United States, and is one of the most abundant leaves in the col- 

 lections of Dr. Gr. M. Dawson and Mr. "Weston from Mill Creek and the Middle Branch, 

 North Fork, Old Man River. It thus forms one of the most interesting links of connection 

 between these floras. 



Platanus affinis, var. ampla. 



Along with the above are leaves resembling it in general appearance, but differing in 

 the wider angle of the principal veins, and in the comparative narrowness of the band of 



' Lesquereux's description, ■nith slight verbal changes- 



