212 rsYGMornvLLFM. 



Type. ? St. Petersburg. 



Leaves palrnisect, large, with segments measuring 2-11 cm. in 

 length. Segments 6-10, entire, lateral segments obovate, median 

 segments cuneiform, truncated distally. Nerves fairly numerous, 

 very distinct, dividing by dichotomy several times. 



The Indian fronds which Feistmantel has identified with 

 Rhipidopsis ginkgoides are distinctly smaller than those figured 

 by Schmalhausen, but, so far as one can judge without seeing 

 the actual specimens, they appear to be identical. 



R. ginkgoides occurs in Gondwanaland in the Barakar Group of 

 India, and has been recorded from the Permo-Carboniferous of 

 South America. 



Not represented in the British Museum collection in association 

 with the Glossopteris flora. 



2. Rhipidopsis densinervis, Feistmantel. 



1881. Rhipidopsis densinervis, Feistmantel, Flora Gondw. Syst., vol. iii, 



pt. 3, p. 121, pi. xlviA, figs. 1, 2, la. 

 1896. R. densinervis, Bodenbender, Zeitschr. deutsch. geol. Gesell., vol. xlviii, 



table opposite p. 772. 



Type. Nos. 5337-8, Mus. Geol. Surv. India, Calcutta. 



Leaves stalked, coriaceous. Segments usually 6, broadly 

 cuneate, apex lobed or ? incised. Nerves veiy numerous, close, 

 repeatedly dichotomous. 



As Feistmantel has pointed out, this species differs from tbat 

 first described by Schmalhausen {Rhipidopsis ginkgoides) by the 

 closer nervation, and in tbe segments being incised. 



R. densinervis occurs in tbe Raniganj Group in India, and in the 

 Permo-Carbonifeious rocks of Argentina. 



Not represented in the British Museum collection. 



Genus PSYGMOPHYLLUM, Schimper, 1870. 

 [Traite, vol. ii, p. 192.] 

 Folia pinnatisecta, pinnis erecto-patentibus, e basi valde angustata 

 flabelliformibus (unde nomen), longitudinaliter flabellatim plicatis, 

 plus minus profunde pinnatisectis, vel margine lobatis seu crenatis ; 

 nervis pluries dichotomis, erecto-radiantibus. Vernatio foliorum 

 verticaliter involuta. 



Psygmophyllum is a type of leaf wbich has given rise to some 



