314 Mr. E. Kidston on the Genus Pothocites. 



Plate X. 



Fig. 6. Fruit of Bornia radiata, Brongn. (Pothocites Pater soni, Eth.), 



showing the fruit attached to a calami tic stem. The spike 

 shows three segments and a portion of a fourth. From the 

 Calciferous Sandstone series, Iiaeb urn's Pit, near West Calder. 



Fig. 7. Impression of the same specimen, which shows more distinctly the 



transverse bars on the segments of the fruit. This example is 

 imperfect, as indicated by a small portion of the axis extending 

 beyond the uppermost segment preserved in the fossil. 



Fig. 8. Fruit of Bornia radiata, Brongn., showing two spikes terminating 



the extremities of a dichotomous branch. From the Calciferous 

 Sandstone series, Barton Pavement-stone Quarry, Corstorphiue 

 Hill, near Edinburgh. 



Plate XI. 



Fig. 9. Fruit of Bornia radiata, Brongn. (Pothocites Patersonif Eth.), 



showing the lowest segment. The fruit is attached to a stem 

 composed of swollen nodes and internodes. The fruit-bearing 

 branch springs from another similar but slightly stouter stem. 

 (Nat. size.) From the Calciferous Sandstones, Fell's Pit, near 

 West Calder. 



Fig. 10. The impression of the last specimen. (Nat, size.) 



Fig. 11. Sphenophyttum tenerrimiim (Ett. MS.), Star. From the Calci- 

 ferous Sandstone series, Raw Camps, East Calder. 



Fig. 12. The same. From the Calciferous Sandstone series, Burdiehouse. 



(In the Hug)] Miller collection, Museum of Science and Art, 

 Edinburgh. My thanks are due to Prof. Archer for permis- 

 sion to figure this specimen.) 



Plate XII. 



Fig. 13. Fruit of Bornia radiata, Brongn. (Pothocites calamituides, Kidst.), 



showing a perfect spike composed of eight segments attached to 

 a calamitic stem. Leaves are given off from the nodal regions 

 of both stem and fruit, some of which show the dichotomous 

 nature of the foliage. From the Calciferous Sandstone series, 

 Glencartholm, Eskdale. 



Fig. 14. Bornia radiata, Brongn. Enlarged sketch of the impression of 



the basal portion of the fruit of the specimen from liaeburn 

 Pit, West Calder, showing transverse bars and node on stem. 



Fiy. 15. Lowest node of the stem of the Eskdale specimen, showing scars 



from which leaves have fallen. (Enlarged.) 



Fig. 10. Two unopened sporangia, from an upper segment of the spike of 



the same specimen. (Enlarged.) 



Fig. 17. One of the open (stellai I sporangia, from the lowest segment 



of the same example. (Enlarged.) 



Fig. IS. SphenophyUum tenerrimum (Ett;. MS.), Stur. From the Calci- 



ferous Sandstone series, Raw Camps, East Calder. 

 Figs. 6-11, 14, and 18 are from specimens in the collection of the Geo- 

 logical Survey of Scotland, Edinburgh. 



