152 Transactions of the [.K'a^MSSI 



from which sprang aerial roots ; leaves acuminate, with a median 

 nerve. Mega])hyton, Artis, ' Antediluvian Phytology,' p. 20. Both- 

 rodendron, Lindl. and Hutt., 1. c, plate Ixxx. 



1. U. parmatus, Carr. Large cicatrix oval, 3^ inches long hy 

 2^ inches broad ; central scar of the form of a double horse-shoe ; 

 leaf scars elongated-rhomboidal. Phytolithus parmatus, Steinh., 

 ' Amer. Phil. Trans.,' vol. i., Ser. 2, p. 287, plate vii., fig. 1 (1818). 

 Lepidodendron ornatissimum, Sternb., ' Flora Vorw.' — Tent., 

 p. xii. (1825). U. Allanii, Buckl., 'Geol. and Miner,,' vol. xi., 

 p. 92, plate Ivi., fig. 3 (1836). U. Bhodii, Buckl., 1. c, p. 93. 

 U. Comjhearii, Buckl., 1. c, p. 94, plate Ivi., fig. 6. TJ. Bliodi- 

 anum, Presl, in Sternb., 'Flora,' p. 186 (1838). U. elUpticum, 

 Presl, 1. c, Bothrodendron pundatum, Lindl. and Hutt., plate 

 ccxviii. (non Ixxx. and Ixxxi.). Megaphytum approximatum, Lindl. 

 and Hutt,, plate cxvi. 



A scar of an aerial root and of some leaves is shown, natural 

 size, on Plate XLIV,, Fig. 4, 



From the Coal-measures, Edinburgh, Newcastle, &c. [Edin. 

 Eoy. Soc. Museum, British Museum, &c.] 



2. TJ. Stohesii, Buckl., ' Geol. and Miner.,' vol, ii,, p. 93, plate Ivi., 

 fig. 5. Large cicatrix, shortly oval, or sub or bicular, 4^ inches 

 long by 3^ broad ; scar of the small vascular bundles somewhat 

 elongated and radiating; of the central bundle, semi-ovate, very 

 broad at the apex, with a free space in the centre ; leaf scars elon- 

 gated-rhomboidal. Megaphytum distans, Lindl. and Hutt., ' Fossil 

 Flora,' plate cxvii. ill, Allanii, Brongn,, ' Hist. Veget. Foss,,' vol. ii., 

 plate xxviii , fig. 5, most probably belongs to this species. The original 

 of his figure is in the Museum of the Eoyal Society, Edinburgh. 



A figure of the scar of the central vascular bundle is given of 

 the natural size in Fig. 3, Plate XLIV. 



From the Coal-measures, Newcastle. [British Museum,] 



8. U. ovale, sp. nov. (Plate XLIV., Fig. 1). Cicatrices oval, 

 2|- inches long by If inch broad; scar of the compact bundle in 

 the centre small, roundish, slightly indented on the upper margin ; 

 scars of the separate bundles very numerous ; depressed margin of 

 the cicatrix with a single series of vascular bundles; leaf scars 

 rhomboidal. 



From the Coal-measures, Edinburgh. [British Museum,] 



4. i[7.j9M»2,i7wjji, sp. nov. (Plate XLIII., Fig. 2). Cicatrices oval, 

 nine lines long by seven lines broad ; scar of the central bundle 

 roundish, nearly central ; leaf scars crowded, and covering the stem, 

 broadly rhomboidal, with a central depression marking the place 

 of the vascular bundle. 



From the Coal-measures, Yorkshire. [British Museum.] 



5. TJ. Taylori, sp, nov. (Plate XLIII., Fig, 1). Cicatrices oval, 



