456 PALAEONTOLOGY OF ILLINOIS. 



nerve in the middle ; pedicel of the sporanges oblanceolate, 

 slightly obtuse, attached to a slender axis. This species, as it 

 was remarked above, is related to Lepidostrobus variabilis, fig- 

 ured and described by Geinitz; but the blades of ours are 

 broader, the pedicels bearing sporanges longer and the axis 

 narrower. The name variabilis was given to the European 

 species on account of the great variety in the size of the cat- 

 kins. The American species appears always large — at least, 

 all the numerous specimens collected at Duquoin are as large 

 as fig. 1, which represents only part of a cone, and is already 

 more than one foot long. Fig. 2 and 3 show the transversal 

 sections of a catkin ; fig. 4, a detached blade with its pedicel. 



Lepidostrobus liastifolius, Sp. nov. Cone about one inch thick ; 

 scales densely imbricated, with the blade open, nearly horizon- 

 tal, at least near the base ; blade short, enlarged at the base 

 into two acute, angular, diverging points, ovate-lanceolate, 

 somewhat obtuse at the summit ; pedicel of the sporange nar- 

 row, linear, acute, a little enlarged above. 



This is the cone whose blade I have named Lepidopliyllum 

 hastatum, Geol. Rept. Penn., p. 876, tab. 17, fig. 7. The pre- 

 served part of the cone is about three inches long, but it is 

 broken and its whole length is not known. Locality : Mazon 

 creek, Grundy county. Coal No. 3. 



Genus Lepidophtllum, Brgt. This genus is preserved for 

 the classification of the fruit-bearing leaves or bladed sporanges 

 of the Lepidostrobi, for as far as they are known only in their 

 isolated state, and have not been seen attached to a common 

 axis. 



Lepidopliyllum lanceolatum, Brgt. Figured and described in 

 the Geol. Report of Penn., p. 875, pi. 17, fig. 1. 



Lepidopliyllum majus, Brgt. Prod., p. 87. Specimens of this 

 and the former species are in the State Cabinet of Springfield. 

 Locality unknown. 



