PALtEOZOIO cone-geinits lepidostrobus. 217 



Vasculm^ ci/linder of cone-axis containing a very small pith. 



Metaxylem traclieides scalariform, with delicate vertical striations between the 

 bars of thickening. 



I 



Sporophyll traces follow an obliquely downward direction in the distal portion of their 

 course from stele to sporophyll pedicel*. The bundle is accompanied by transfusion 



tracheides throughout the pedicel. 



Sporophyll pedicel about 6 mm. in length, winged^ with a sclerised ridge on either 

 side of the median line. The pedicel has a heel which is characterised by an epidermis 

 of small cells, followed internally by a large-celled hypoderma. 



Spoi^angium attached to pedicel by means of a well-marked ridge of tissue, containing 

 transfusion elements. There appears to be a radial plate of sterile tissue arising from 

 the floor of the sporangium. 



Spores about 0*03 mm. in diameter, including the equatorial border. 



(ii.) Lepidosthobtjs gracilis, sp. nov. 



(PI. 22. fig. 9 ; Pi. 23. figs. 10-12 ; PL 25. figs. 31-39 ; PI. 26. figs. 40-42.) 



(1) Material. 

 The material on which the following account is based consists primarily of five 



sections* (four longitudinal and one transverse) cut from coal-balls obtained by 



Mr. Lomax from Hough Hill, Stalybridge. Two of these sections f were cut from the 

 same cone, and the three others, though cut from different cones, appear to belong to 



the same type. 



A single section in the Williamson Collection, British Museum (C. N. 1776 D.), which 

 is described in Williamson's manuscript catalogue as " an apparently distinct form," 



also to belong to this species. In addition, the Leiden Herbarium possesses 

 a series of sections $, including considerable portions of two cones, which are probably 

 specifically identical with L. gracilis. These latter cones were obtained from the Scam 

 Pine Prau-Nebenbank, Eheinpreussen Colliery, near Duisburg, Germany. 



seems 



(2) General Form and Dimensions of the Cone and Sporophylls. 

 Some idea of the general construction of the strobilus may be obtained from the 

 photograph reproduced in PL 23. fig. 10, which is tangential as regards the middle 

 region, but nearly radial at the sides. In the two principal longitudinal sections, the 

 cone is incomplete at the apex § and possibly at the base also. The dimensions of 

 the lonirest fragment are 4'6 cms. in length by Qd cm. in diameter, but, as there 



o"""" ''•"o 



is no truly radial section, the actual width of the cone must be estimated as 



Slides 276, 277, 278, 279, 280, Sedgwick Muaeum CoU., Cambridge. 



t Slides 276 & 277. 



t Slides Gl,Glg 1-5, g 10-16, Leiden Herbarium Coll. 



§ 



It is 



acutely pointed and formed of overlapping sporophyll lamlnjB. The sporophyll pedicels towards the tip of the cone 

 leave the axis at an acute angle, whereas, in the main part of the cone, they leave it almost at right angles. 



