230 THE POTOMAC OK YOUNGER MESOZOIC FLORA. 



on some portions of the shale. They are shown partly in PI ClII, Figs. 

 10-12, and PI. CIV, Fig. 6. These were never seen certainly attached to 

 any stem, but their bases are sometimes well shown, looking as if they 

 had been attached in a clasping manner by a widened base, and in PI. CIV, 

 Fig. 6, the base may be seen attaclied to what seems to be a portion of the 

 stem. In PI. CIII, Fig. 12, two bases seem to be put together, possibly by 

 accident. These leaves may belong to a different species, but I place them 

 provisionally in the species now being described. 



Leptostrobus foliosus, sp. nov. 



Plate CI, Fig. 4 ; Plate CIII, Fig. 5; Plate CIV, Fig. 1. 



Leaves long and very slender, about 1°"° in width, length not made out, 

 densely crowded on the principal and longer shoots throughout their length, 

 grouped in bundles at the ends of the shorter lateral shoots : nerves very 

 slender, not well made out, apparently three in number. 



Localities: Fishing hut above Dutch Gap Canal; red clay ball in the 

 banks of Dutch Gap Canal. 



This is clearly a different species from the preceding, and it is not so 

 common. The nerves could be seen on only one specimen and that vaguely, 

 so that their number is not positively determined. They appear to be three, 

 but this may be due to the state of preservation, and the number visible 

 may vary according to the condition of the fossil. It is quite possible that 

 the true number may be four. The leaves are almost always seen detached 

 and crowded together, as if derived from the same specimen. 



Leptostrobus ? multiflorus, sp. nov. 



Plate CLXV, Fig. 6. 



Strobile stipitate, with a very thick axis of inflorescence, covered by 

 numerous small spatulate-shaped scales, that are loosely imbricated and 

 arranged in a spiral manner. 



Locality: 72d mile-post, near Brooke. 



Only one specimen of this curious inflorescence was found, and it was 

 too imperfect to make out clearly its character, since the rock on which the 

 imprint was made is a rather coarse sandstone. The specimen was evi- 



