CARBONIFEROUS LYCOPODS AND SPHEXOPHYLLS. 123 



Have also been observed on Sphenophyllum oblongifolium, Germar 

 and Kaulfuss.' 



I have also received from Mr. Hemingway specimens of 

 Sphenophyllum cuneifolium, Sternb. sp., showing a similar 

 Asterophyllites-like form of foliage. 



Xotwithstanding the occurrence of the linear-leaved foliage 

 on Sphenophyllum, the genus has probably no affinity 

 with the Calamites, of which Asterophyllites is the foliage. 

 Sphenophyllu7)i differs from Calamites in the ribs not alternating, 

 in the fructification and in the internal organization of the stem ; 

 in fact, there are almost no points in which the genera show any 

 contact. 



The species of which the fructification is most fully known are 

 the following : — 



Sphexophyllum trichomatosum, Star. 



1887. Sphenophyllum trichomatosum, Stur. Die Calamarien der 

 Carbon Flora der Schatzlarer Schichten (Abhandl. d. k. k, 

 Geol. Reichsanst., Vol. XI., part 2), p. 202, PI. XV., 

 figs. 1-4. 

 Sporangia oval, sessile, one (?) on each sporophyll. (Fig. 22.) 

 There is no observable presence of a pedicel or sporangiophore, 

 and though the examples on which the 

 observations have been made are pre- 

 served on shale, still the sporangia are 

 well preserved, and would, I think, 

 have shown the sporangiophores had 

 they been present.'- 



The irregularity in position of the Fig. 22. — Sphenophyllum 

 sporangia to which Professor William- trichomatosum, Stur. Ar- 

 , T^ <-. , . p • f rangement of sporangia 



son and Dr. bcott reter arises trom , ,, 



(enlarged). 



the sporangia of a whole verticil being 



flattened on one another.' The attachment of the sporangia of 



Sphenojjhyllum majus, Bronn sp., desciibed later (p. 128), gives 



' Renault, Fiort foss. tei-r. houil. dt Covienlry, part 2, p. 483, PI. L., figs. 

 1-2. See also Newberiy, " The Genus Sphenophyllum," Joum. Cincinnati 

 Soc. Nat. Hist., Vol. XIII., p. 213, PI. XIX., fig. 4. 1891. 



= Kidston, Proc. Boy. Phys. Soc. Edia., Vol. XI., p. 59, PI. I. 1891. 



» Phil. Trans., Vol. CLXXXV., p. 942. 1895. 



