CARBONIFEROUS LYCOPODS AND SPHENOPHYLLS. 123 



have also been observed on Sphenophyllum oblongifolium, Germar 

 and Kaulfuss. 1 



I have also received from Mr. Hemingway specimens of 

 Sphenophyllum cuneifolium, Sternb. sp., showing a similar 

 Asterophyllites-like form of foliage. 



Notwithstanding the occurrence of the linear-leaved foliage 

 on Sphenophyllum, the genus has probably no affinity 

 with the Calamites, of which Astcrophyllites is the foliage. 

 Sphenophyllum 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 : — 



Sphenophyllum trichomatosum, Stur. 



1887. Sphenophyllum trichomatosum, Stur. Die Calamarien der 

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

 Geol. Reichsanst, Vol. XL, part 2), p. 202, PL 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 ^^^ =====ff ^ / 



well preserved, and would, I think, ^S^lf ) ( ih V 

 have shown the sporangiophores had T~? 



they been present. 2 ' * 



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

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

 t -px c p • <? rangement of sporangia 



son and Dr. Scott reter arises irom : , ,. 



(enlarged). 

 the sporangia of a whole verticil being 



flattened on one another. 3 The attachment of the sporangia of 

 Spheno-phyllvjm majus, Bronn sp., described later (p. 128), gives 



1 Renault, Fiort foss. terr. houil. dt Comenlry, part 2, p. 483, PI. L., figs. 

 1-2. See also Newberry, "The Genus Sphenophyllum," Journ. Cincinnati 

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



2 Kidston, Proc, Roy. Phys. Soc. Edin., Vol. XL, p. 59, PL I. 1891. 



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



