564 MESOZOIC FLORAS OF UNITED STATES. 



the most abundant at Belt and Covington streets in Baltimore. For 

 some reason they are better preserved than most of the dicotyledons 

 occurring at the Baltimore localities. The more perfect specimens found 

 in the collections made by Mr. Bibbins give a more accurate idea of the 

 plant than could be obtained from the fossils serving as the basis of th? 

 description given in Monograph XV. PL CXVIII, Figs. 3, 4, give two of 

 the leaves that show most character. Fig. 3 represents a portion of a leaf 

 of the largest size. The basal part is wanting, but the terminal portion is 

 well preserved, showing most of the teeth. This leaf, in its widest part, 

 which is below the middle, is at least 5 cm. wide. It narrows very grad- 

 ually toward its summit, so that a rounded form is indicated for the 

 entire leaf. Fig. 4 shows more of the base, which is still imperfect, and 

 in this specimen is somewhat distorted. A portion of the petiole is pre- 

 served, which indicates that it must have been broad and flat. There 

 seems to have been no predominant midrib, but several rather slender 

 primary nerves of nearly equal strength diverge from the summ.it of the 

 petiole to fill the lamina of the leaf. The ultimate nervation is as 

 described on page 287 of Monograph XV. 



Both the specimens figured occur in collection No. 8, that represented 

 in Fig. 3 being M. G. S., No. 8593, and that in Fig. 4 No. 8556. 



Prote^phyllum Uhleri Fontaine n. rp. 



PI. CXVIII, Fig. 5. 



This is a complete leaf of what seems to be a new species of Protese- 

 phyllum. The leaf has entire margins and a rather thick texture. It is 

 wider than long, with a broadly elliptical form, the elliptic shape being 

 transverse to the axis of the leaf. In the widest part, which is near the 

 base, it is a little over 4 cm. wide. Its length is a little more than 3 cm. 

 At the base there is a slight decurrence of the lamina along the petiole. 

 The midrib continues about halfwaj^ up the lamina of the leaf and is dis- 

 solved into the tertiary nerves, which form an irregular, coarse, polygonal 

 network. The lateral or secondary nerves occur only in the basal part of 

 the leaf. They are indefinite in form, and quickly dissolve into tertiary 

 nerves, which, like those at the summit of the leaf, form an irregular net- 

 work. The tertiary are almost as strong as the secondary nerves. The 

 latter, indeed, can be distinguished by their size from the former only at 



