DESCRIPTION OF THE SPHCIBS. 200 



merous and narrow, being uiuler l"""in width; the leaves attain a maxinnim 

 length of 4"'", bnt mostly are under that, and have a maximum width of 

 3.5"", but generally are narrower; nerves as in B. pluripart'da, but more 

 subdivided, closer, and more delicate. 



Localities the same as for B. pluriimrtlta. 



The specimens of this plant are much more numerous than those of B. 

 pluripartita, but they are mostly very fragmentary. This is the most com- 

 mon Baicropsls at Dutch Gap, and it is the most conmion plant in the red 

 clay ball which occurs in the banks of the canal. It appears in numerous 

 fragments poorly preserved at the entrance to Trent's Reacli, being found 

 in the same layer with Froidopsls parccramosa, and Dioonifcs Buvhiaiius. 

 The lower right-hand leaf in PI. XCII, Fig. 3, is nearly a complete one, 

 wanting only the tips of the ultimate laciniae, which no doubt, as in B.pluri- 

 parfita, terminated in teeth. The above-mentioned leaf is one of the largest 

 found in this plant. 



Baieropsis foliosa, sp. nov. 



Plato XCIII, Figs. i-G. 



Leafy branches abruptly changed to leaves in ascenduig (Fig. 4); lower 

 leafy branches of the main stems having on the upper side simple leaves, but 

 on the lower side, towards the base, possessing leafy branches of the normal 

 type in place of the sim[)le leaves of the upper side ; leaves and leafy 

 branches closely placed; leaves quite small, f\xn-sliaped, short, mostly di- 

 vided nearly to the base into two principal lamin;c, both of which are sub- 

 divided a little above the base into laciniiB; these in turn, by dichotomous 

 subdivision, give short strap-shaped lobes, which end in two shallow acute 

 or narrowly elliptical teeth, or else in two narrowly oblong subacute teeth; 

 nerves forking at base and then repeatedly forking in a dichotomous man- 

 ner, so that the branches from the last forking end in the teeth. 



Localities: Bank near Brooke: White House Bluff. 



At the last-named place the plant is very rare, but it is aljundant at the 

 bank near the railroad in the vicinity of Brooke. Hero it is, with the ex- 

 ception of the angiosperm leaves, the most common fossil. There is some 

 variation in the size of the leaves and in the number of subdivisions, some 

 MON XV 14 



