CARBONIFEROUS. 199 



a number of cones, evidently belonging to different species, but which from 

 the want of definite characters cannot at present be separated from each 

 other. 



Lepidostrobus ornatus is only a peculiar state of preservation of Lepidos- 

 trobus variabilis. In Lepidostrobus ornatus the upward rising bracts have 

 been broken off from their horizontal basal portion, which bore the sporangia. 

 The con in this imperfect state shows on its outer surface a series of rhom- 

 boidal meshes, as figured by Lindley and Button, and Hooker.* What has 

 been described as a seed by Lindley and Hutton in their description of 

 pi. xxvi. is one of the sporangia. 



The genera Jfacrocystis, Lesquereux, and Polysporia, Newberry,f have 

 been founded on imperfectly preserved cones of the Lepidostrobus ornatus 

 type, where the prolonged portion of the bract, which in well-preserved 

 specimens extends outwards and upwards from its basal part, has been 

 destroyed by decay. Such specimens are common at Coalbrook Dale and 

 elsewhere in Britain ; many of which, as well as others, showing their internal 

 structure, are in the Collection. Some of the following examples, though 

 here placed under Lepidostrobus variabilis, may probably be the cones of 

 Lepidodendron Sternbergii. 



Horizon. Coal Measures. 



? Lepidodendron Sternbergii: 



Localities. British. Durham : Sunderland. Gloucestershire : Forest of 

 Dean. Northumberland : Felling Colliery, New- 

 castle-on-Tyne. Shropshire : Coalbrook Dale. Staf- 

 fordshire : Netherton. 



Lepidostrobus variabilis : 



Durham : Sunderland. Midlothian : Burdiehouse, 

 near Edinburgh (Calciferous Sandstone Series). 

 Northumberland : Newcastle-on-Tyne. Monmouth- 

 shire : Near Blaeniarvon. 



Forma ornatus: 



Shropshire : Coalbrook Dale. Staffordshire : Spring 

 Vale, near Bilston. Worcestershire : Near Dudley. 



Forms somewhat differing from the ordinary type of L. variabilis : 



Lanarkshire : Monkland, near Airdrie. Warwick- 

 shire : Tamworth. Wales (South) : Ebbw Vale ; 

 Merthyr-Tydvil. 

 Foreign. Westphalia : Langendreer. 



Lepidostrobus Brownii, linger, sp. 



Lepidostrobus Brownii. 



Schimper, Traite d PahSont. V6get. vol. ii. p. 67, pi. Ixii. fags. 13-29. 



Triplosporites Brownii. 

 Unger, Genera et Species, p. 270. 



Triplosporites. 

 Brown, Trans. Linn. Soc. vol. xx. p. 471, pis. xxiii. xxiv. 



Remarks. The example in the Collection is a transverse section of the 



original specimen. 



Horizon. Carboniferous. 

 Locality. 1 



* See Hooker, Mem. Geol. Survey Great Britain, vol. ii. part ii. pi. viii. fig. 3. 

 f Report, Geol. Survej Ohio, vol. i. p- 360. 



