38 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



The smaller leaves are transversely oval and have very much the 

 appearance of sporangia, but the occurrence of sporangia mixed 

 with the leaves of a stem that terminates in a well-defined cone 

 is a condition quite unknown amongst recent Lycopods. I am 

 therefore led to regard these oval structures as a dimorphic 

 condition of leaf. 



Again, in the dimorphic-leaved Lycopods the leaves are placed 

 in four rows, but in Lycopodites Stockii there appears to be at 

 least six rows, though more probably there were eight rows, as 

 shown b}^ small scars left by the fallen leaves. The state of 

 preservation of the fossil does not admit of a satisfactory 

 determination of this point. 



The specimen is about 4 inches long, of which the cone occupies 

 about 1^ inches, but it is incomplete. 



Solms-Laubach refers to this fossil as "a remarkably fine form 

 with the habit of Lycopodium Phlegmaria" l 



It was collected by Mr. Thomas Stock from the Calciferous 

 Sandstone Series, Glencartholm, Eskdale, Dumfriesshire. 



II. Arch.eosigillaria. Kidston, n.g. 



Plants with stems attaining a diameter of over 2*5 cm. Leaf- 

 scars contiguous, broadly fusiform on younger branches, hexagonal 

 on older stems, having a single vascular cicatrice. 



Remarks. — This genus is formed for the reception of the plant 

 which has usually been designated Sigillaria Vanuxemi, Gopp. 



As far as I am aware the only known specimens of the plant are 

 the original example figured, but not named, by Vanuxemi, 2 and 

 to which Goppert applied the name of Sigillaria Vanuxemi, 3 and 

 those in the Kendal Museum, some of which I described and 

 figured in 1SS5. 4 



From the examination of the Kendal Museum specimens it 

 appeared to me that the plant could not be included in 

 Sigillaria. and I therefore placed it in Lycopodites. 



Subsequent study has, however, shown that it must also be 

 removed from Lycopodites, and that there is no existing genus in 



1 Fossil Botany, p. 1S6. 



2 Gtol. of New York, Part III., p. 184, tig. 51, 1S42 



3 Goppert : Foss. Flora d. Ubergangs, p. 249, 1852. 



4 Kidston: Linn. Soc. Jour. Bot., Vol. XXI., p. 560, PI. XVIII. 



