PALEOZOIC CONE-GENUS LEPIDOSTEOBTJS. 233 



Gibson^ R. J. H. {'96). "Contributions towards a Knowledge of the Anatomy of tlie genus Sela- 



yiaella^ Spr[ing], Pt. II. The Ligule." Ann. Bot. vol. x. (1896) p. 77. 



Hooker^ J. D. ('48). — ^' Remarks on the Structure and Affinities o£ some Lepidostrobi.^^ Mem. Geo!. 



Survey Gt. Brit. vol. ii. pt. ii. p. 440, 1848. 



■ r 



KiDSTON, R. (^83), — "Report on Fossil Plants, collected by the Geological Survey of Scotland in 



Eskdale and Liddesdale." Trans. Roy. Soc. Edinb. vol. xxx. (1883) p. 531. 

 MasleNj a. X C98). — "The Ligule in LepidostrohusJ^ Ann. Bot. vol, xii. (1898) p. 256. 

 Maslen^ A. J. ('99). — " The Structure of ie/?ii/o^/roAw5/^ Trans. Linn, Soc. London, 2nd Ser. Bot. 



vol. V. (1899) p. 357. 

 Scott, D. H. ('00).— Studies in Fossil Botany, Ed. I. London, 1900. 

 Scott, R. (Mrs. D. H. Scott) (^06). — "On the Megaspore of Lepidostrobus foliaceus.'' New Phyt. 



vol. V, (1906) p. 116. 



W 



(^10).— Fossil Plants. Vol. ii., Cambridge, 1910. 



^^On Mesostrobus. a New Genus of L^ 



Coal Measures, with a Not* 



(1909) p. 379. 

 Williamson, W. C. (73).— ^^On t 



Lycopodiacese {continue d).^^ 



nes from the Lower 

 Ann. Bot. vol. xxiii. 



to 



Measures. Part III. 

 II. (1873) p. 283 (for 





w 



to 



Measures. Part 



XIX." Phil. Trans. Roy. Soc. London, Ser. B, vol. 184, 1894 (for 1893) p. 1. 



M. ('08). — " Vegetaux fossiles du terrain carbonifcre du Bassin du Donetz. II. Etude sur 

 la structure anatomique d'un Lejndostrobus." Mem. Comite Geol. St. Petersb., N. S. Livr. 46, 



1908. 

 Zeiller, R. ('11). — "Etude sur le Lepidostrobus Brownii (Unger) Schimper." Mem. de I'Acad. des 



Sci. Paris, t. 52, 1911. 



EXPLANATION OP THE PLATES. 



23, 27 are from Photographs by W 

 s 24, 25, 26 are from Drawings by 



Plate 21. 



Lepidostrobus oldhamius, Will. Figs. 1-3. 



Pig. 1. General view of an oblique section through the apex of a cone to show plates of sterile tissue 



from the floors of the sporangia, [st.p.). Sedjwick Mus. Coll., Slide 281 (before 

 g down). (X7^ circa.) The sporangium marked * is shown on a larger scale iu 



fig. 2, and the sterile plate f in PI 24. 6g. 16. 



(ffj». = cone apex; *^. = spores ; /. = sporophyll ; /;5r. = ligule.) 

 Fig. 2. Enlargement of the sporophyll and sporangium, marked * iu fig. 1, to show ligule. Sedgwick 



Mus 



) 



(«/?m.M7. = sporangium wall; *p. = spores ; s.a.;?. = sub-archesporial pad; ?. = sporophyll ; 

 /.^ avascular bundle of sporophyll ; /y. = ligule.) 



