6l 2 
Notes. 
Conifer ae : Cryptomerites divaricatus Bunb., Cheirolepis setosus 
(Phill.), Araucarites Phillipsi Carr., Taxites zamioides (Leek.), 
Brachyphyllum mamillare Brongn., Pagiophyllum Williamsoni 
(Brongn.), Czekanowskia Murray ana (L. and H.), Nageiopsis anglica, 
sp. nov. 
Ginkgoaceae : Ginkgo digitata (Brongn.), G. Whitbiemis Nath., 
Baiera Lindleyana (Schimp.), B. gracilis Bunb., B. Phillipsi Nath., 
Beania gracilis Carr. 
Cycadales : Williamsonia gigas (L. and H.), W. Pecten (Phill.), 
Otozamites Beani (L. and H.), 0 . acuminaius (L. and H.), O. graphicus 
(Leek.), O. Bunburyanus Zign., O. obtusus (L. and H.), var. oolitica, 
O. Feistmantelli Zign., O. parallelus Phill., Dioonites , sp., Nilssonia 
compta (Phill.), N. mediana (Leek.), N. tenuinervis Nath., Anomoza- 
mites Nilssoni (Phill.), Ptilozamites Leckenbyi (Leek.), Ctenis falcata 
L. and H., Podozamites lanceolatus (L. and H.), Pachypteris lanceolata 
Brongn. 
A. C. SEWARD, Cambridge. 
A NEW GENUS OF PALAEOZOIC PLANTS 1 The follow- 
ing description is based on the examination of ten sections prepared 
from a fragment of stem in the Binney Collection (Wood wardian 
Museum, Cambridge). The type-specimen occurs in a calcareous 
matrix associated with the shells of Goniatites, and was originally 
obtained from the Lower Coal-Measures of Lancashire; it consists 
of a cylinder of secondary xylem, 2 cm. in breadth, enclosing a central 
region, 1-9 cm. in diameter, occupied by primary xylem. The wide 
primary stele is made up chiefly of groups of unusually large tracheids 
with their walls covered with bordered pits, associated with thin-walled 
parenchyma ; the tracheids are characterized by their isodiametric or 
horizontally elongated form, while a few are distinguished by their 
greater length. In the peripheral region of the primary stele the 
tissue assumes various forms ; the large short tracheids and parenchyma 
extend in places close up to the inner edge of the secondary wood, but 
more or less compact groups of narrower and longer tracheids occur 
here and there in the peripheral zone and constitute leaf-traces. 
1 Read before the Botanical Section of the British Association, Dover, Sept. 1899. 
For a more complete account of the genus vide Proceedings of the Cambridge 
Philosophical Society, Vol. x, Part III, p. 158, 1899. 
