CLAD0PULEI5IS. 141 



Type. No. 5183, Mus. Geol. Surv. India, Calcutta. 



Frond large, bipinnate. Ilachis strong, punctate. Pinnae set 

 almost at right angles to the rachis. Pinnules longest in the 

 median portion of the pinna, shorter towards base and apex, 

 inseiied slightly obliquely, oblong, incurved, contiguous, connate 

 at the base. Median nerve of pinnule distinct, persisting to the 

 apex, giving off simple secondary nerves at an acute angle. 



The fine frond described b\ T Feistmantel from the Raniganj 

 Coalfield appears to me to belong to the genus Pecopteris rather 

 than to Alethopteris. In habit and nervation it recalls some of the 

 Pecopterids of the Upper Coal Measures and Lower Permian rocks 

 of the Northern Hemisphere. The fructification is unfortunately 

 unknown, and it is therefore not safe to insist, as Feistmantel has 

 done, on its near relationship with the recent genus Phegopteris, 

 which it somewhat closely resembles in the habit of the frond. 



P. phegopteroides is known only from the Raniganj Group of the 

 Damuda division iu India. 



Not represented in the British Museum collection. 



Genus GLADOPHLEBIS, Brongniart, 1849. 

 [Tableau Genr. Veget. foss., p. 25.] 



"Fronds pinnately divided, pinnae spreading, lobes or pinnules 

 attached by an entire base or slightly contracted towards the place 

 of attachment, rarely somewhat auriculate, acuminate, or obtuse, 

 occasionally dentate, especially at the apex, not rarely sub-falcately 

 curved upwards, midrib strong at the base and towards the summit 

 dissolving into branches, secondary veins given off at a more or less 

 acute angle, dichotomous a little above the base, and repeatedly 

 dichotomous." l 



Cladophlebis is an artificial form-genus especially characteristic of 

 the Triassic, Jurassic, and Wealden rocks. A full account of fronds of 

 this type will be found in Mr. Seward's Catalogues of the Mesozoic 

 Plants in the British Museum. 



Seward (94), p. 88. 



