FOSSIL PLANTS. 



655 



scales. Its external portion, when it is not 

 covered by scales, rliomboidal, concave in 

 the middle. 



One species in the new red sandstone. 



CRYPTOGAMIO PLANTS. 



EQUISETACE-ffi. 



Genus 61. Equisetum. Stems articulated, surrounded 

 hy cylindrical sheaths, which are regularly 

 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 and lias. 



Two in the coal formation. 

 Genus 62. Catamites* Stems jointed regularly and 

 closely furrowed, hollow, divided internally 

 at the articulations by a transverse dia- 

 phragm, covered with a thick cortical inte- 

 g-ument; leaves vertieillate, very narrow, 

 numerous, and simple. 



Two species in the transition beds. 



Several species in the coal formation. 



Two species in the new red sandstone. 



Two in the new red sandstone and coal 

 formation. 

 Genus 63. Pachypteris. Leaves pinnated or bipinnated; 

 leaflets entire, coriaceous, ribless, or one 

 ribbed, contracted at the base, but not adhe- 

 rent to the midrib. 



Two species in the inferior oolite. 

 Genufl 64. Sphenopteris. Leaves bi-tripinnatifid; leaf- 

 lets contracted at the base, not adherent to 

 the rachis, 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. 

 GenuB 65 Cydopteris. Leaves simple, entire, some- 

 what orbicular; veins numerous, radiating 

 from the base^ diehotomous, equal, midrib 

 wanting. 



Four species in the coal formation. 



One species in the transition rocks. 



One in the oolite. 

 Genus 66. GlossopieiHs. Leaves simple, entire, some- 

 what lanceolate, narrowing gradually to the 

 base, with a thick vanishing midrib; veins 

 oblique, curved, equal, frequently diehoto- 

 mous, or sometimes anastomosing and reti- 

 culated at the base. 



Two species in the coal formation. 



One in the oolite. 



One in the lias. 

 Genus 67. Neuropteris. Leaves bipinnate or rarely 

 pinnate; leaflets usually somewhat cordate 

 at the base, neither adhering to each other, 

 nor to the rachis by the whole base, only 

 by the middle portion of it; midrib vanish- 

 ing at the apex ; veins oblique, curved, very 

 fine, diehotomous; fructification^ sori-laneeo- 

 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. 



Three in the new red sandstone. 



One in the anthracite of Savoy. 



One in the Muschel kalk. 

 Genus 68. Odmtopteris. Leaves bipinnated; leaflet 

 membranous, very thin, adhering by all theu- 



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. 

 Genus 69. Anomopieris. Leaves pinnated; leaflets li- 

 near, entire, somewhat plaited transversely 

 at the veins, having a midrib; veins simple, 

 perpendicular, curved ; fructification arising 

 from the veins uncertain as to form, perhaps, 

 dot-like, and inserted in the middle of the 

 veins, or perhaps, linear, attached to the 

 whole of a vein, naked, as in jnenisciaj or 

 covered by an indusium, opening inwardly. 



One species in the new red sandstone. 

 Genus 70. Tieniopteris* Leaves simple, entire, with a 

 stiff thick midrib ; veins perpendicular, sim- 

 ple or forked at the hase; frtictificaiion dot- 

 like. 



Three species in the lias and oolite. 

 Genus 71. Pecopteris. Leaf once, twice, or tlu-ice pin- 

 nate; leaflets adhering 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 diehotomous. 



Sixty species in the coal formation. 



Ten in the oolite. 



Two in the lias. 



One in the beds above the chalk. 

 Genus 72. Lonchopteris. Leaf many times pinnatifid; 

 leaflets more or less connate at the base, 

 having 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. Schizopieris. Leaf linear plane, without 

 midrib, finely striated, almost flabelliform, 

 dividing into several lobes which are linear 

 and diehotomous, or rather irregularly pin- 

 nated and erect; lobes dilated, and rounded 

 towards the extremity. 



One species in the coal formation. 

 Genus 75. Felicites. This comprehends all that are not 

 referable to the preceding genera. 



One species in the new red sandstone. 



Two species in the variegated marl of the 

 lias. 

 Genus 76. Caulopteiis. Stem cylindrical, closely mark- 

 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. 

 Genus 77. Otopteris. Leaf pinnated; leaflets originat- 

 ing obliquely from the side of the leaf stalk, 

 auricled, attached by about half their base, 

 destitute of all trace of midrib; veins of 

 equal size, very closely arranged, diverging 

 from their point of origin, and dividing 

 dichotomously at a very acute angle. 



Three or four species from lias, oolite, and 

 new red sandstone. ' 



LYCOPODIACEiE. 



Genus 78. Lycopodites. Branches pinnated; leaves in- 

 serted all round the stem in two opposite 



