150 ON THE FOSSIL FLORA OF THE COAL DEPOSITS OF AUSTRALIA, 



The plant impressions often occur as in the Indian Ptilophyllum in 

 a compact limestone, or an opaque chalcedony, in which the frag- 

 ments of the fronds are imprinted and then have been broken. 

 These have been subsequently stratified into lines of breccia between 

 masses of more compact rock. 



Stangerites. Bornemann 1856.* 

 This genus was established by Bornemann for certain species of 

 Cycads which had previously been regarded as Ferns of the genus 

 Tceniopteris, but which from their resemblance to the living Cycad 

 Stangeria (from Port Natal), were called Stangerites. I mention 

 this, because one species found by me at Rosewood, near Ipswich, 

 was certainly Oldham v. Morris's Stangerites ensis, now however, 

 regarded as a Fern of the genus Angiopteridium, already described 

 in the foregoing pages. 



Otozamites. Fr. Braun. 



{Odontopteris, Sternb. Goeppert, Unger, in part. Otopteris, 

 Lindley and Hutton, Schenk. ) 



Leaves moderately large, rarely very large, regularly pinnate, 

 elongately linear, narrowed at each end, leaflets densely close or 

 more or less remote, alternate or linear lanceolate, obovate 

 rhomboid or sub-circular, base suddenly narrowed, obliquely 

 inserted on the upper side of the sub-terete rachis, unequally 

 auriculate, upper auricle smaller than the lower one, and ad pressed 

 to the rachis. Nerves radiating from the insertion of the leaflet ; 

 basilar arcuate, the others sub-arcuate, once or more dichotomous. 

 Epidermis with elongate deeply sinuous cellules. This genus 

 which is distinguished by its peculiar leaflets and thin mode of 

 attachment to the rachis, has been by some, regarded as a Fern 

 allied to Lindscea, but the cycadaceous character is well established. 

 Otozamites make their first appearance between the Trias and Lias. 

 They abound most in the middle Oolite, and after that, diminish 

 until in the upper Oolite, they are replaced by Zamites and 

 Sphenozamites , No existing form closely resembles them. 



* Ueber organische Reste der letzteren Kohlengruppe, Thuringen. 



