ofUlodendron to Lepidodendroiij &c. 257 



England — Coal-measures. 



Durham : High Main Seam, South Shields {Type of U. 

 minus, Hutton collection). 



Northumberland : Benshara Seam, Jarrow {Type of U. 

 majus, Hutton collection). 



Shropshire : Coalbrookdale ( Type of Halonia disticha, 

 Prof. Morris). 



Staffordshire : Longton {J. Ward) ; Low Moor {collection 

 of British Museum) . 



Worcestershire : Bewdley {collection of British Museum.) 



Yorkshire : Boldshaw, Bradford Moor, Bradford {collec- 

 tion of British Museum) ; Wakefield {ditto). 



Sigillaria Taylori, Carruthers. (PI. IV. figs. 6, 6 a ; 

 PL V. fig. 9 ; PI. VI. figs. 10, 10 h, c, d.) 



Ulodendron Taylori, Oarrutliers, MontHy Micr. Journ. vol. iii. p. 152, 



pi. xliii. fig. 1 (1870). 

 Ulodendron minus, Thompson, " On Ulodendron and Halonia^'' Trans. 



Edinb. Geol. Soc. vol. iii. p. 341, pi. (B). 

 Lepidodendron Veltheimianiim, Stur (in part), Culm Flora, pi. xxxix. 



figs. 1,2. 

 Sigillaria, sp., Kidston in Cadell, Trans. Edinb. Geol. Soc. vol. iv. 

 p. 335. 



Description. Branches dichotomizing ; leaf-scars small, 

 rhomboidal, contiguous, their transverse and vertical diameters 

 being almost equal. Leaf-scars placed on slightly elevated 

 cushions, whose size little exceeds that of the leaf-scar ; upper 

 and lower angles of leaf-scar rounded, lateral angles sharp, 

 but scarcely produced. Vascular impression situated towards 

 the upper part of the leaf-scar. Certain branches bear two 

 opposite vertical rows of large (Ulodendroid) scars, those of 

 one row alternating in position with those of the corresponding 

 vertical row. Large scars circular, occasionally oval, usually 

 separated by a slight interval, but sometimes touching each 

 other. Bark generally fissured by longitudinal clefts. Large 

 scar-bearing branches ending in a truncated apex. Decorti- 

 cated specimens also exhibit the longitudinal fissures and 

 show on their surface small " dots " arranged in quincuncial 

 order. Leaves single-nerved, lanceolate. Fructification 

 (sessile ?) cones attached to the vertical rows of large scars. 



Remarks. This species is much smaller in all its parts than 

 Sigillaria discophora, nor do its branches appear to have 

 attained the same magnitude as those of the last-mentioned 

 species. The leaf-scars also are more truly rhomboidal. 



The form of the leaf-scars is not well shown in the type 

 specimen of this species, but they are better shown in the three 

 other figures of this plant, which have been given under tlie 



