XXVIl] 



DIPLOTMEMA 



535 



Di'phtmema. 



This generic name is employed by Zeiller' and other authors 

 in a more restricted sense than that in which it was originally 



Fig. 354. A. Palmatopteris. 



B. Mariopteris. (A, B, after Potoni^.) 



C. Diplotmema Zeilleri, Stur. (After Zeiller.) 

 C D. Zeilleri. Pinnule. ( x 3. After Zeiller.) 



D. Neuropteris macrophylla. (British Museum .) 



D'. N. macrophylla. Pinnule. (Slightly enlarged. After Kidston.) 



E. N. heterophylla. Pinnule. (Slightly enlarged. After Zeiller.) 

 P. N. Scheuchzeri. (Slightly reduced. After Kidston.) 



6. AUoiopteris Essinghii. (Enlarged. After Potoni^.) 



used by Stur. The Upper Carboniferous species Sphenopteris 

 furcata Brongn. (fig. 352, E) may serve as the type. This species 

 occurs in the Middle and Lower Coal-Measures of Britain'-'. 



1 ZeUler (79^) ; (88) A. p. 142. 



2 Kidston (94) p. 240. 



