FOSSIL PLANTS. 



6.35 



scales. Its external portion, when it is not 

 covered by scales, rliomboijal, concave ill 

 the middle. 



One sjiecies in the new red sandstone. 



CRYPTOGAiMIC PLANTS. 



Genus 64. 



EQUISETACEi:. 



Gfcnus 61. Equisetum. Stems aitieulated, surrounded 

 by cylindrical sheatlis, wliicU are re),nilarly 

 tooth-letted, and pressed close to the stem. 

 One species in the London clay. 

 One in the variegated marls of the lias. 

 One in the lower oolite ;ind lias. 

 Two in the coal formation. 

 Genus 62. Calamitcs. Stems jointed regularly and 

 closely furrowed, hollow, <Uvidcd internally 

 at the articulations by a transverse dia- 

 phragm, covered with a thick cortical inte- 

 gument ; leaves vcrticillate, very narrow, 

 numerous, and simple. 



Two species in tlie transition beds. 

 Several species in the coal formation. 

 Two species in tlie new red sandstone. 

 Two in the new red sandstone and coal 

 formation. 

 Uenus 63. Fadiypleris. Leaves pinnated or bipinnated ; 

 leaflets entire, coriaceous, ribless, or one 

 ribbed, contracted at the base, but not adhe- 

 rent to tlie midrib. 

 Two species in the inferior oolite. 

 . Spltenojileris. Leaves bi-tripinnatifid; leaf- 

 lets contracted at the base, not adherent to 

 the raehii!, lobed, the lower lobes largest, 

 diverging, somewhat palmate; veins bipin- 

 nate, radiating as it were from the base. 

 One species in the sand below the chalk. 

 Two species in the new red sandstone. 

 Five species in the oolite. 

 Twenty-eight species in the coal forma- 

 tion. 



Cydojttera. Leaves simple, entire, some- 

 what orbicular; veins numerous, radiating 

 from the base, dichotomous, equal, midrib 

 wanting. 

 Four species in tlie coal formation. 

 One species in the transition rocks. 

 One in the oolite. 

 Glossopteris. Leaves simple, entire, some- 

 what lanceolate, narrowing gradually to the 

 base, witli a thick vanishing midrib ; veins 

 oblique, curved, equal, frequently dichoto- 

 mous, or sometimes anastomosing and reti- 

 culated at the base. 



Two species in the coal formation. 

 One in the oolite. 

 One in the lias. 

 Nem-opteris. Leaves bipinnate or rarely 

 pinnate; leaflets u.sually somewhat cordate 

 at the base, neither adliering to each other 

 nor to the rachis by the whole base, only 

 by tlie middle portion of it; midrib vanish- 

 ing at the apex; veins oblique, curved, very 

 fine, diehotomou-i; fructification, sori-Ianceo"- 

 late, even, covered with an indusium, arising 

 from the veius of the apex of the leaflets, and 

 often placed in the bifurcations. 



Twenty.four species in the coal formation. 

 Tliree in the new red sandstone. 

 One in the anthracite of Savoy. 

 One in the Musehel kalk. 

 Odontopteris. Leaves bipinnated; leaflet 

 membranous, very thin, adhering by all their 



Genus 69. 



Genus 70. 



Penus 65 



Genus 66. 



Genus 67. 



Genus 68. 



base to the rachis, with almost no midrib; 

 veins equal, simple, or forked, very fine, most 

 of them springing from the rachis. 



Five species in the coal formation. 

 Ammopteris. Leaves pinnated; leaflets 11- 

 near, entire, somewhat plaited transversely 

 at the veins, having a midrib; veins simple, 

 perpendicular, curved ; friiciificution arising 

 from the veins uncertain as to form, perhaps, 

 dot-like, and inserted in the middle of the 

 veins, or perhaps, linear, attaelied to tlio 

 whole of a vein, naked, as in meniscia, or 

 covered by an indusium, opening inwardly. 



One species in the new red sandstone. ' 

 Taniopteria. Leaves simple, entire, with a 

 stiff thick midrib; veins perpendicular, sim- 

 ple or forked at the hase; fructificaiion dot- 

 like. 



Three species in the lias and oolite. 

 Genus 71. Pecopteris. Leaf once, twice, or thrice pin- 

 nate; leaflets adiiering by their base to the 

 rachis, or occasionally distinct; midrib run- 

 ning quite through the leaflet; veins almost 

 perpendicular to the midrib, simple, or once 

 or twice dichotomous. 



Sixty species in the coal formation. ■ 

 Ten in the oolite. 

 Two in the lias. 



One in tlie beds above the chalk. 

 Genus 72. Lonchopie,ia. Leaf many times pinnatifid; 

 leaflets more or less connate at tlio base, 

 havmg a midrib; veins reticulated. 

 Two species in the coal formation. 

 One in the greensand. 

 Genus 73. Clathropteris. Leaf deeply pinnatifid; leaf- 

 lets having a very strong complete midrib; 

 veins numerous and simple, parallel, almost 

 perpendicular to the midrib, united by trans- 

 verse veins, which form a net work of square 

 meshes upon the leaf. 

 One species in the lias. 

 Genus 74. Schizopteris. Leaf linear plane, without 

 . midrib, finely striated, almost flabelliforni. 

 dividing into several lobes wliieh are linear 

 and dichotomous, or rather irregularly pin- 

 nated and erect; lobes dilated, and rounded 

 towards the extremity. 



One species in the coal formation. 

 Genus 75. Felidtes. This comprehends all tliat are not 

 referable to the preceding genera. 

 One species in the new red sandistone. 

 Two species in the variegated marl of the 

 lias. 



Genus 76. Caulopteris. Stem cylindrie.il, closely m,ark- 

 ed by large, oblong, convex, uneven scars, 

 •wider than the tortuous depressed spaces 

 that separate them. 



Two species in the coal formation. 



One in the new red sandstone. 

 Genu... 77. Otopteris. Leaf pinnated; leaflets originat- 

 ing obliquely from the side of the leafstalk, 

 auricled, attaelied by about half their base' 

 destitute of all trace of midrib; veins of 

 equal size, very closely ananged, diverging 

 from their point of origin, and dividing 

 diehotomously at a very acute angle. 



Three or four species from lias, oolite, and 

 new red sandstone. 



LYCOl'ODIACEJE. 

 Genus 78. L;/copodites. Branches pinnated; leaves in- 

 serted all round the stem in two opposite 



