50 



BRITISH EOCENE ELORA. 



AspiDiuM LiGNiTUM, Heev. Beitr. Sachs.-Thiiring. Braunk., p. 424, pi. ix, figs. 2, 3, 



1861. 



Drtandea rigida, Ileer. lb., p. 427, pi. x, fig. 15. 



AspiDiUM Meyeri, Ludwig (non Heer). Palseontograpbica, vol. viii, p. 63, pi. xii, fig. 3, 



1860. 



Pecopteris LIGNITUM, Heer. Lignites of Bovey Tracey, Phil. Trans., vol. clii, p. 1047, 



pi. iv, figs. 5 and 6 (not fig. 4) ; pi. Ivi, figs. 2 — 11 

 (not fig. 1), 1861. 



OsMUNDA Grutschreiberi, Stur. Jahrbuch der k. k. Geol. Eeichsanstalt, vol. xx, 



p. 9, pi. ii, 1870. 



— LiaNiTUM, Heer. Ueber die Braunkohlen-Flora des Zsily-Thales, Jahrbuch 



der k. Ungar. Geol. Anstalt., vol. ii, p. 9, pi. 1, figs. 

 2, 3, 1872. 



0. fronde pinnata^ pinnis elongato-linearibus, subcoriaceis, apice valde attenuatis et 

 acuminatis, basi breviter petiolatis, margine profunde inciso-serratis rarius remote 

 denticulatis vel basi undulatis ; nervatione Pecopteridis vei'a, nervo primario basi valido 



prominente, subrecto, apicem versus attenuato, indiviso ; nervis secundariis numerosis, 

 angulis acutis egredientibus, plus minusve flexuosis sub apicibus loborum plerumque 



furcatis ; nervis tertiariis inferioribus furcatis sub angulis minus acutis orientibus, rarius 

 elongatis convergenti-arcuatis, sinum attingentibus ; nervis tertiariis superioribus sub 

 angulis acutissimis orientibus, scepe simplicibus subcurvatis fiexuosisve. 



Middle Bagshot, Boumenioutli and Bovey Tracey. 



The pinnules are found in layers in some of the black clay beds both east and west of 

 the pier at Bournemouth. Whole slabs are often covered with these pinnules, which are 

 always detached. When first found they are perfectly preserved and of a substance like 

 coal, but on exposure to the air the leaves crack and dry up from the matrix in a few 

 moments, and their preservation is difficult. Occasionally well-preserved pinnules are 

 also found in the Eern-beds under the Marine Beds ; elsewhere they are rare, and towards 

 Poole I have found but a solitary fragment. They occur precisely as at Bovey, and are 

 equally associated with terminal buds of a Sequoia-like Conifer, rush-like leaves, and 

 spines of Cactus. Stur has figured a specimen with pinnse attached, which he has 

 named 0, Grutschreiberi ; and he has obliged us by stating that he still considers the 

 presence of a small basal expansion on the under-side of the pinna as of specific value. 

 In the ' Quarterly Journal of the Geological Society,' vol. xxvi, pi. 24, p. 349, Carruthers 

 described and figured a Eern-stem under the name of Osmundites Doiokeri, from the 

 Thanet Sands, which was so beautifully preserved that even the starch granules were 

 replaced by silica and so preserved. It belonged to a larger species than 0. regalis 

 (see p. 53). 



The following corrections have, in our opinion, to be made in Prof. Heer's descrip- 

 tion of Osmunda lignitum [Pecopteris, Heer), from the ' Lignites of Bovey Tracey.' 



PI. v, figs. 9, 10, 11, ' Lignites of Bovey Tracey,' represent circinate vernation, found as- 



