PLATE XLII. 



i^EUKOPTERIS DILATATA (L. and H.) Lx. 

 (Page 137.) 



Fig. 1. Portion of relatively small pinnule. U. S. Nat. Mns., 5672. 



la. Detail of portion of surface showing vascular bundles. Another detail of an area nearer the 

 base is shown as PI. XLI, Fig. 6a. X2. 



Ojdontopteris ? Brad LEVI Lx. 



(Page 12.5.) 



Fig. 2. Apical jKirtion of pinna, on right of which are seen pinnules representing O. BradUiji, while 

 on the left the lamina is for some distance entire as in 0. Worlheni Lx. The specimen is 

 perhaps only a heteromorphous pinna of the Nenropteris Sclieuchzeri Hoflfm. U. S. Nat. 

 Jlus., .5623. 

 2o. Eularged detail of portion of the same showing nervation and short fine hairs appressed on 

 tbe surface of the pinnules. U. S. Nat. Mus., 5623. X2. 



:^fEUROPTEBIS SCHEUCHZERI Hoffm. 



(Page 132.) 



Fig. 3. Single pinnule, representing a small narrow form of the species, with relatively slender apex, 

 known as .y. anrjusUfolia. U. S. Nat. Mus., .5633. 

 3a. Portion of the same enlarged to show the asymmetrical auriculate aud pedicellate base, the 

 nervation, and the short slender hairs appressed on the surface. x2. 



!N"EUROPTERIS MISSOtTRlENSIS Lx. 



(Page 130.) 



Fig. i. Typical small pinuiP. U. S. Nat. Mns., 5632. 



ia. Enlarged detail of a pinnule of the same. X2. 



Alethopteris Serlii (BrongD.) Goepp. var. missouriensis D. W. 



(Page 118.) 



Fig. 5. Characteristic aspect of pinna with large pinnules. U. S.Nat. Mus., 3591 B. 

 5n. Enlarged detail of pinnule. X2. 



