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PROCEEDINGS OP THE ACADEMY OP 
side, another secondary nerve, wliich runs nearly parallel with the basal one, 
and further above are two other similar ones. The nervules are curved, soms 
remaining single, others forked. In all these points the Nebraska leaf agreee 
with Populus leuce, but for a positive determination we must wait for leaves 
whose margins have been preserved. 
A similar leaf from the Isle of Wight has been figured by Prestwieh (on the 
structure of the strata between the London clays, &c., Quart. Jour. x. pi. iv. 
fig. 1, 2), but in this (of which I have specimens before me) the lower basal 
nerves are much stouter, and the two upper ones are curved much more 
toward the apex, while the midrib cannot send forth any more sach stout 
secondary nerves farther up. 
At first sight the leaf also appears similar to Credneria integerrima Zenker, 
Paleontographica, but in this leaf the midrib is much stouter, and the side 
nerves are more bent and curved towards the apex, otherwise the nervules are 
of similar structures. 
6. Populus cyclophylla, Mihi. 
P. foliis orbiculatis, basi attenuatis, triplinervis, integerrimis. 
Similar to the preceding, and may perhaps belong to that species as a 
younger leaf, yet the base of the leaf is attenuated toward the petiole, and 
there are at the base of the leaf only three nerves. On the supposition that 
the former leaf is Populus leuce it is assumed that it is rounded at the base, 
but should more perfectly preserved specimens show that, like the small one, 
it is diminished at the base into the petiole, it would form a species different 
from Populus leuce, as in this latter species the leaves are rounded at the base, 
and moreover possess some obtuse teeth on the margin. 
7. PJujllites obtusi-lobatus, Mihi. 
Folium trilobatum, lobis integerrimis, obtusiusculis. 
Perhaps belonging to Liriodendron Meekii, but Liquidambar and Acer are 
also to be taken into consideration. It is, however, too imperfectly preserved to 
be determined with certainty. It seems to have three lobes with entire margins. 
8. PhijUites obcordatus, Mihi. 
Polium obcordatum, basi angustatum, integerrimum, nervo-primario po- 
necto, nervis secondariis angulo acuto, egredientibus, debilibus, subramosis. 
Valde affinis Ph. clusiodes, Rossmassler, Beitrage 33, Taf. 6, fig. 24, et non 
nisi nervis secundariis fortioribus et ramulosis distingusenim. 
The Corresponding Secretary read his report for the last two months. 
The following reports from the Recording Secretary, the Librarian 
and the Curators were read : 
REPORT OF THE RECORDING SECRETARY FOR 1858. 
During the past year, Dec. 1, 1857, to November 30, 1858, there have been 
elected sixty-nine members and eight correspondents. 
Of these thirteen members were not residents of the city at the time of their 
election. 
Two members have resigned. 
Three have forfeited their membership. 
Seven have died, to wit : Mr. Charles McEuen, Mr. W. Frederick Rogers, 
Professor John K. Mitchell, M. D., Professor Robert Hare, M. D., the Hon. Job 
R. Tyson, Edward Minturn, M. D., and Glavin Watson, M. D. 
The deaths of the following correspondents have been announced : Mr. 
George R. Gliddon, Mr. John A. Vancleve. 
The following Papers have been read before the Academy, and ordered to be 
published in the Proceedings or Journal. 
By Spencer F. Baird, ' ' Description of a new Phyllistome Bat from California. ' ' 
By W. G. Binney, two, to wit : ' ' Notes on American Land Shells, No. 3 and 
No. 4." 
[Dec. 
