44 STRATA OF TILGATE FOREST. 



bably part of an unknown species of palm, or arborescent fern : Mr. Konig 

 observes, that " some arborescent Dicksonias are very like it with regard to 

 the lozenge-shaped bases of the fronds, or leaves." 



This specimen is from the sandstone, and is the only one hitherto 

 discovered *. 



5. A compressed clavated culm or stem of a plant, the surface pos- 

 sessing a leafy structure, and having numerous tortuous sinuses, that pass 

 into the substance of the fossil : a transverse section, tlu-ee inches in 

 diameter, exposed thirty-five openings produced by this cause. 



These fossils occur in fragments from a few inches, to several feet in 

 length, and some of them attain a considerable magnitude, being upwards 

 of two feet in circumference. They are of an irregular club-like form, 

 having a very narrow base, and are invested with a thick carbonaceous 

 covering, removable by washing. Their constituent substance is a hard 

 limestone, of a light ash colour, interspersed with drusy crystals of car- 

 bonate of Ume. They are found associated with the fossil vegetables, pre- 

 viously noticed, but are of more rare occurrence. The internal structure 

 of these petrifactions resembles that of many succulent plants, and in their 

 outward form they so nearly approach the euphorbiae, that it may be pre- 

 sumed they are the remains either of an unknown species ol that genus, 

 or of one very closely allied to it. 



6. Impressions and remains of the foliage of unknown vegetables, in a 

 carbonized state, lying in confused masses in the car-stone and limestone 

 shale. 



So far as their form can be distinguished, some of the leaves appear 

 to be of an ovate, and others of a lineari-lanceolate shape; but they are 

 too imperfectly displayed to admit of accurate determination. In some 

 respects they resemble the foUage of the Derbyshire phytolite. Pet. Derb. 

 Tab. 12 ; and as they are associated with the supposed euphorbiae, it 

 seems probable that the stems of the latter were furnished with leaves, of 

 which these are the remains. 



* Subsequent observat\ons have convinced me that this specimen is decidedly the epider- 

 mal covering of Nos. 2 and 3, the latter being the casts of the internal part of the original. 



