CONTRIBUTIONS TO OUR KNOWLEDGE OF BRITISH PALAEOZOIC PLANTS. 719 



Lagenospermum parvulum Kidston, n. sp. (PI. Ill, figs. 7, 7a ; text-fig. 2.) 



Description. — Small, seed entirely surrounded by the cupule, 4*5 to 5 mm. long, 

 2'15 to 2 '65 mm. wide, oval, rounded at base and slightly contracted towards the 

 apex, frequently longitudinally plicate, and terminating in six short teeth. Epidermal 

 cells of cupule small, quadrate. 



Remarks. — Lagenospermum parvulum is closely related to L. Kidstoni Arber, sp., 

 but differs in its smaller size and in the cupule being slightly contracted upwards, 

 which gives it a less obtuse form at the apex. The average size of L. Kidstoni is 

 6 mm. long with a width of 2'5 to 3 mm., whereas L. parvulum is only 5 mm. long 

 and 2"15 to 2*65 mm. wide. The teeth also appear to be a little more clearly defined. 

 Owing to the colour of the matrix it was difficult to get a good photograph of the 

 specimen, but the text-figure (2, A and B, x7) gives a clear idea of the form of the 



a B 



TWct-Fig. 2. 



cupule — the only part of the fossil exhibited, as the seed is entirely surrounded and 

 obscured by it. 



Locality. — Pelbower Burn, fully \ mile north of Kirkconnel Church, Dumfries- 

 shire. 



Horizon. — In blaes, 3 feet above a 5-inch coal, a few fathoms above the " Skipsey 

 Band." Westphalian Series. Collected by Mr D. Tait. Specimen in the Collection 

 of the Geological Survey of Scotland. 



EXPLANATION OF PLATES. 

 Plate I. 



Fig. 1. Sigillaria Strivelensis Kidston, n. sp. x 2. (T. 2195 B.) 



Fig. 2. „ „ „ „ x 2. (T. 2212 B.) 



Fig. 3. „ „ „ „ Natural size. Fig. 3a, x 2. (T. 2189 B.) 



Fig. 4. „ „ „ „ „ Fig. 4«, x 2. (T. 2198 B.) 



Fig. 5. „ „ „ „ „ Fig. 5a, x 2. (T. 2394 B.) 



Locality. — Stein's Fireclay Works, f mile north-east of Castlecary Railway Station, Stirling- 

 shire. 



Horizon. — Millstone Grit. Lanarkian Series. 



