704 MR . w. CARRUTHERS ON FOSSIL CYCADEAN STEMS. 



VIII. Raumeria, Goppert. 



1844. Raumcria, Gopp. Wimmer's Flora von Schlesien, . vol. ii. p. 217; (1853) Denkschrift zur Feier 



von dcr Schles. Gesellsch. p. 259. 

 Trunk cylindrical, densely covered with the hases of the fronds and with stipulaeform scales. Scars of 



the petioles subrhomboidal, arranged quincuncially, and separated by the rhomboidal scars of the 



scales or stipules. 



This genus is based upon the fragments of two stems, which I should not hesitate to 

 refer to Mantellla, were it not for the small stipuhsform scars which are placed in quin- 

 cuncial spirals among the large petiolar scars. They have the same form as the petiolar 

 scars, and are made up of whitish parenchyma penetrated by gum-canals. The vascular 

 tissue has disappeared. In the possession of these small scars they differ, as Goppert 

 observes, from all known Cycads, recent or fossil. Both species have axillary branches, 

 composed of small leaves grouped in a circular elliptical manner, and which are in sec- 

 t ion similar to the stipulaeform scars. The large scars figured in B. Beichenbachiana are 

 formed by the decay of the axillary organ, which probably had the fruit buried in the 

 bases of the petioles. Similar appearances may be seen in the drawing of Mantellla 

 inclusa, in Plate LXIII. fig. 3, and in several specimens of Bennettites, in the collections 

 of the British Museum and Geological Society. 



Goppi-rt establishes a new tribe of Cycadece, under the name Filicoidece, for these two 

 1 ils, because of the separation of the petiolar cicatrices by the small interposed scars 

 reminding him of the stems of ferns. There can be little doubt that they are near allies 

 of the forms I have included in Bennettitece. The discovery of more perfect specimens 

 would enable us to understand the structure of their fruits and the nature of the stipuhe- 

 form appendages. The hope of this, however, is very small, as neither of the specimens 

 was found in situ, and their age is consequently unknown ; the one was found in the 

 earth thrown out of a canal near Gleiwitz, and the other in a swamp near Wieliczka. 



R. Sc 



Gopp. Wimmer's Flora, vol. ii. p. 217 ; Denkschrift, p. 259, tab 



figs. 1-5, tab. viii. figs. 1-3. 

 Cicatrices of the petioles transversely subrhomboidal, six lines broad and three to four 



fines deep, lateral angles acute, superior and inferior obtuse ; scars of the stipulaeform 

 scales subtrigonous, from two to two and a half fines broad, arranged quincuncially 



o the ku B 



Found in the Klodnitz canal, near Gleiwitz. 



R. Reichenbachiana, Gopp. Wimmer's Mora, vol. ii. p. 217 ; Denkschrift, p. 262 



tab. viii. figs. 4-7, tab 



Cicatrices of the petioles trigonous, six to eight lines broad and six lines deep, angles 



obtuse ; scars of the stipulseform scales small, subtrigonous, from one to one and a 

 half line broad, arranged quincuncially among the large scars. 



Found in a swamp at Lednice. near TO»K*.v. ;~ i^o 





