SCIENTIFIC EXPEDITION TO NORTHEASTERN COLORADO 1 53 



probably about 24 cm. long, apparently very thick, with pinnate venation, 

 and the margin nearly entire, but faintly undulate, with slightly indicated 

 and remote teeth near the middle. Lateral veins (secondary) few, alter- 

 nate, those of either side about 22 mm. apart, leaving the midrib at an 

 angle of about 45°, slightly curved, strongly curved upward toward 

 their ends where they become parallel with the midrib, finally branching, 

 and failing to reach the margin; toward the apex the lateral veins 

 become closer, and in one place two arise nearly together; cross-veins 

 (nervilles), between the laterals, numerous, the principal ones about 

 thirteen in number between two laterals near the middle of the leaf, 

 these cross-veins often bent near the middle, and in general directed 

 somewhat obliquely, neither at right angles to the midrib, nor to the 

 laterals; region between the cross- veins broken into many small mostly 

 quadrangular areas by crossing veinules. The side of the base of another 

 leaf shows the main laterals closer together, the fourth only about 21 mm. 

 from the first (and doubtless nearer at point of origin), and the first only 

 about 6 mm. from the margin, the usual curved veins leaving its lower 

 side at intervals of about 8 mm. 



Among living species of Ficus, this may be compared with F. syco- 

 morus L., but that has no closely adjacent basal laterals. The basal 

 region of our leaf is much more like that of Artocarpoides conocephaloides^ 

 Saporta, but the cross-veins are not so numerous, or quite so oblique, 

 as in that leaf. There is quite a close resemblance to, and very likely 

 real relationship with, Pterospermites undulatus Knowlton, but that 

 differs in the structure of the basal parts, is apparently a narrower leaf, 

 and the region between the nervilles is very much less divided into 

 spaces. None of the species of Ficus figured by Knowlton from the 

 Montana formation agree at all closely. I had wished to name the 

 plant after its discoverer, but owing to the imperfection of the material, 

 it appears best to withhold a specific name. In doing this, I follow the 

 advice of Dr. Arthur Hollick, who kindly examined a photograph of the 

 specimen. • 



4. Birds — Account of Species Seen, with Distribution 



By Harvey Markman 



Traveling from the base of the foothills at Boulder to a point nearly 

 a hundred miles out on the plains a territory was crossed in which the 



' Flora fossile de Sezanne, PI. VI. 



