158 TEMPSKYA. 
structures; these often appear in the specimens as oval or round 
tubular cavities, but in some cases show a horseshoe vascular band, 
to which I have already referred in speaking of Velenovsky’s 
figures. Similar structures are represented in Corda’s figures of 
the petioles of Zempskya pulchra and T. microrhiza In two of 
the Museum slides there are oblique sections of sclerenchymatous 
tissue, in which the cavities of the fibres have been filled with 
some opaque black substance, the fibre walls being represented by 
clear spaces. The result is that each sclerenchymatous element 
has the form of a tapered cast of the cavity of the fibre, and 
radiating from this black spindle-shaped body occur tiny spoke-like 
structures, evidently casts of the fibre pits. An identical form of 
preservation has been described by Stenzel? in his paper on Rhizo- 
dendron Oppoliense, Gopp. 
The general conclusion of these remarks may be summed up 
as follows: In Zempskya Schimperi we have masses of branched 
diare fern roots associated with petiole axes, which occasionally 
afford evidence of branching; probably some forms of Zempskya 
and Protopteris are very closely related, if not identical plants; 
but, so far as English specimens are concerned, there is an absence 
of any direct proof of such organic connection between the two 
fossils as Feistmantel and Velenovsky have previously suggested. 
V. 216. This specimen shows good examples of repeatedly 
branched structures, possibly roots. Ecclesbourne. Rufford Coll. 
V. 1441. Two specimens with this registered number; on one 
piece there is a fairly thick layer of coal enveloping the semi- 
mineralized tissues. Ecclesbourne. Rufford Coll. 
V. 2246. V. 2462. Smaller pieces. Ecclesbourne. 
Rufford Coll. 
7345. Slightly more than 19 inches long. Tilgate Forest. 
Mantell Coll. 
7346. Eleven inches broad and 3} inches thick. Tilgate Forest. 
Mantell Coil. 
1 Flor. Vorwelt, pl. lviii. 
2 Jahres-Ber, Schles. Ges. Kultur, Erganzungsheft, 1886, pl. iii. figs. 27-29. 
