On Two of Lindley and Hutton’s Type Specimens. 239 
Trizygia, both of which are genera confined to the Coal- 
Measures; and this is perhaps the more probable supposition.” 
“ As far as we can make out, the ends of the leaflets were 
rounded as we have represented them, but we cannot be 
sure that the margin has not been broken away.” 
Although probably it would have been wiser not te 
have founded a new species on this specimen, still in 
some respects the state of preservation of the fossil is 
not so imperfect as the above quotation would lead one 
to believe. 
On Plate IX., Fig. 1, is given a carefully prepared illustra- 
tion of the plant. The rachis is thin but of firm texture, 
and well shown; towards the upper part of the specimen 
it is broken, and the separated part is slightly displaced to 
the left. The leaves on the right are on a lower level 
than those on the left, owing to the oblique manner in which 
the plant has been embedded in the stone, as described by 
the authors of the “ Fossil Flora,’ but the position of the 
rachis clearly shows that all the pinnules were originally 
placed on the same plane. The plant is without doubt a 
Lhacopteris. 
Only two of the pinnules appear to show their apex—the 
sixth and seventh from the top on the right side. Their 
ground tissue has almost entirely disappeared, hence the 
terminations of the veins are all that is left to mark the 
circumference of the pinnules. 
Fig. la shows the nervation, and what has probably been 
the form of the pinnules. 
The specimen, which is from the (? Middle) Coal-Measures, 
Knowlsbury, Shropshire, was communicated to Lindley and 
Hutton by Sir Roderick Murchison. 
II. SPHENOPTERIS POLYPHYLLA, L. and H. 
[Plate IX., Figs. 2, 2a, 20, 2c.] 
Sphenopteris polyphylla, L. and H., Fossil Flora, vol. ii., pl. exlvii., 1835. 
Description.—Frond bipinnate (or decompound ?); pinne 
alternate; uppermost ultimate pinne reduced to an oval or 
oval-lanceolate blunt pinnule; lower ultimate pinne deltoid, 
