108 TRANSACTIONS, NATURAL HISTORY SOCIETY OF GLASGOW. 



In the pedicellate cones the distinction between the cone and 

 the pedicel is not so abruptly defined as in Lepidostrobus. In 

 Sigillariostrobus the upper portion of the pedicel bears a number 

 of barren, generally linear or setaceous bracts, which become 

 more numerous immediately below the cone, and which gradually 

 assume the form of sporophylls. 1 



In all the Sigillarice the cones seem to have been produced on 

 stems more or less advanced in age, and in this respect they 

 differ from the Lepidodendra, where (with the exception of one or 

 two TJlodendroid-Lepidodendra), the cones are borne at the 

 terminations of the branchlets. 



In addition to the various Sigillarian cones to which reference 

 has already been made, several other examples have been figured 

 and referred to Sigillariostrobus, but these specimens I do not 

 think should be included in that genus. As reference to these 

 will be found in my second paper "On the Fossil Flora of the 

 Yorkshire Coal Field," where some Sigillarian cones are described, 

 it is not necessary to further mention them here. 2 



XI. Stigmaria, Brongt. See p. G6. 



XII. Stigmariopsis, Grand 'Eury, 1877. 



1877. Stigmariopsis, Grand 'Eury. Flore Carbonifere du Depart, 

 ds la Loire et du centre de la France, p. 171. 



1894. Stigmariopsis, Solms - Laubach. Dames u. Kayser. 

 Palceont. Abhandl, New Series, Vol. II., Part 5, 

 p. 223 (Ueber Stigmariopsis Grand 'Fury). 



Stigmaria-like rhizomes, but proportionately shorter and 

 thicker, springing from the hollow cup-like base of the Sigillarian 

 stem in four primary arms, which again bifurcate — probably 

 several times. From the lower surface of the four primary 

 divisions, immediately at the base of the trunk, spring downward 

 directed conical growths (the " tap-roots " of R. Brown). Surface 



1 See Zeiller— Ann. d. Scienc. Nat., 6 e Ser. Bot., Vol. XIX., PI. I., figs. 

 1-4; PI. II., figs. 2 and 5. Zeiller, Flore foss. Bassin houil. d. Valen- 

 ciennes, PI. LXXXIX.,figs. 1-3; PI. XC, fig. 1. Kidston, Trans. Roy. 

 Sec. Edin., Vol. XXXIX. (No. 5), PI. I., figs. 1, 2, and 4 ; PI. II., fig. 4. 



2 Trans. Roij. Soc. Edin., Vol. XXXIX., p. 33. 



