XX II] DANAEOPSIS 409 



well-marked midrib are given ofif secondary veins dichotomously branched 

 close to their origin. The linear synangia near the ends of the veins 

 contain two rows of sporangial compartments and open as two valves as 

 in Marattia. (Cf. fig. 245, A, p. 320.) 



This species occurs in the Rhaetic beds of Scania, Fran- 

 conia, and Tonkin. A similar type is figured by Fontaine from 

 Jurassic beds in California as Angiopteridium calif ornicum^, 

 and Bartholin^ and Moeller' record M. Muensteri from the Lias of 

 Bomholm. Schenk's species from China^, Angiopteris Richt- 

 hofeni, is a closely allied species, and a similar form is recorded 

 from Jurassic and Caucasian strata ^ The microscopical exami- 

 nation by Nathorst' of a group of spores from a synangium 

 of M. Muensteri shows that they resemble those of recent 

 Marattiaceae. 



From the Upper Triassic plant beds of Lunz, Stur has 

 included several species of ferns in the Marattiaceae, and of 

 these Krasser' has recently published full diagnoses but un- 

 fortunately without illustrations. In addition to Marattiopsis 

 marantacea (Presl) the list includes species referred to Coni- 

 opteris, to Speirocarpits, a genus founded by Stur, to Oligocarpia, 

 Asterotheca, and Bernouillia (Heer). 



As already pointed out, some at least of these Austrian ferns 

 are more probably Osmundaceous than Marattiaceous. 



Danaeopsis Hughesi, Feistmantel. 



The pinnate fronds described by FeistmanteP froin the 

 Middle Gondwana rocks of India and recorded from Rhaetic 

 strata in South Afi-ica», China'», and Tonkin", may belong to 

 a member of the Marattiaceae, but no fertile specimens have 

 been described. The close agreement between the sterile leaves 

 from India and South Africa and the fertile fronds of Marattiopsis 

 marantacea suggests generic identity. 



1 Fontaine, in Ward (00) PI. lv. figs. 3—5. = Bartholin (92) PI. ix. 



3 Moeller (02). * Schenk (83) A. 



5 Seward (07<) PI. ii. figs. 16—18. « Nathorst (08). '' Krasser (09). 



8 Feistmantel (82) Pis. iv.— x. ' Seward (08) p. 95. 



1" Krasser (00) PI. ii. " Zeiller (03) PI. is. 



