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 by 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 IJ inches, but it is incomplete. 



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

 with the habit of Lycopodium Phlegmaria." ' 



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, * and 

 to which Goppert applied the name of Sigillaria Vamixemi, ^ and 

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

 figured in 1885.* 



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. 186. 



2 Geol. of New York, Part III., p. 184, fig. 51, 1842 



* Goppert : Fosn. Flora d. Ubtrgangs, p. 249, 1852. 



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



