160 DR ROBERT KIDSTON ON THE 



Horizons and Localities. — 



Blue Measures, six feet above Brooch Coal : Hamstead Colliery, Great Barr, 



near Birmingham. Collected by Mr Meachem. 

 Above Brooch Coal: Tividale. 

 Immediately beloiv Thick Coal: Hamstead Colliery, Great Barr, near 



Birmingham. Collected by Mr H. Insley. 



Lagenostoma Williamson. 



Lagenostoma oblonga Kidston, n. sp. 



PI. VII. figs. 1, la, 2, 2a. 



Description. — Seeds borne in pairs at the extremities of short, dichotomously 

 divided branchlets, and surrounded by an oblong cupule 1 cm. long and 3'50 mm. wide, 

 which splits into six linear segments about 4 mm. long and about 1 mm. wide, that end 

 in sub-acute points. Seed small, oval, 2*50 mm. long, and about 1*50 mm. wide. 



Text-fig. 8. — Lagenostoma, oblonga Kidston. Seed enclosed in cupule, enlarged 3 J times. 



Remarks. — A single specimen of this fructification has been found. It is preserved 

 in a small ironstone nodule, and the two halves are seen on PI. VII. figs. 1, 2, natural 

 size. These are enlarged 2 times at figs, la and 2a. Owing, however, to the 

 colour of the matrix, the fossil does not show up so clearly in the photographs as it 

 does on the specimen. I therefore add an outline sketch of the cupule on the right 

 of fig. 2. Here the form of the segments into which the cupule splits are better seen. 

 Their lower portion is linear, but above they contract into a sub-acute point. On all 

 the figures indications of the outline of the seed are seen. In one cupule it lies near 

 the base ; in the other, higher up (text-fig. 8) — in the latter case evidently displaced 

 from its original position. 



The foot stalks are short and stout for the size of the seed. 



Lagenostoma oblonga is closely related to Lagenostoma Sinclairi Kidston, # but 

 is distinguished by its larger size, the oblong, not campanulate form of the cupule, 

 and the smaller size of its seeds. In Lagenostoma oblonga the oval seed is 2 '50 mm. 

 long and 1'50 mm. broad ; in Lagenostoma Sinclairi it is from 4 to 5 '5 mm. long and 

 from 1*5 to 3 mm. in breadth. 



* In Arber, Proc. Roy. Soc. London, vol. B, lxxvi. p. 251, pi. ii. figs. 7-11, 1905. 



