XLV] ULLMANNIA; STROBILITES 299 



acute, decurrent, and more or less falcate and like those of other 

 species characterised by longitudinal striae on the dorsal face 

 (fig. 750, A). Well-preserved impressions of this species in the 

 Dresden Museum bear a close resemblance to shoots of Araucaria 

 Bidwilli and A. brasiliensis. Some specimens show laterally 

 attached oval cones, but it is not clear if these are reproductive 

 shoots or vegetative buds and nothing is known as to the nature 

 of the sporophylls. The seeds, Cardiocarpus triangular is 1 , referred 

 by Geinitz to this species on the ground of association,, cannot be 

 safely assigned to Ullmannia. In leaf-structure (fig. 750, B, C) 

 U. frumentaria closely resembles U. selaginoides but the hypo- 

 dermal fibres form oval strands instead of 1 2 layers. The 

 species has also been recorded from the Permian of France 2 . 



Strobilites. Strobilites Bronni (Goeppert). 



Under this provisional name Solms-Laubach 3 described the 

 problematical fossils from the Frankenberg copper mines which 

 Goeppert believed to be the megastrobili and cone-scales of 

 Ullmannia Bronni. In the absence of any satisfactory evidence 

 of connexion with the vegetative shoots on which U. Bronni was 

 founded it is better to follow Solms-Laubach in the adoption of the 

 non-committal name Strobilites. These star-stones ('Sterngrau- 

 pen') of the miners consist of more or less circular bodies bearing 

 some resemblance to the peltate cone-scales of Cupressus; they 

 occur either singly or in cone-like groups. No seeds have been 

 found attached to the scales nor is there any proof that they were 

 borne by a Conifer. The larger scales, 15 25 mm. in diameter, 

 are characterised by 8 12 radial ridges and a central depression 

 ( ? umbo), and to the under surface is attached a cylindrical stalk 

 usually in the centre but occasionally excentric. The scales are 

 sometimes found in almost spherical clusters and another form 

 described by Solms-Laubach consists of a cylindrical cone-like 

 aggregate 4 cm. x 2 cm. of rather smaller scales without radial ribs 

 and characterised by a stout, rounded, peripheral border. 



1 Geinitz (80) PL in. figs. 1115. 



2 Zeiller (06) B. p. 219, PL L. 



3 Solms-Laubach (84). 



