OLDER POTOMAC OF VIRGINIA AND MARYLAND. 557 



2. One specimen collected by Prof. P. R. Uliler has his name and the words 

 "Behmd Federal Hill, Baltimore," pasted on the rock. 



3. One specimen collected by Professor Uhler in April, 1894, was donated by 

 him to the National Museum through Professor Ward on April 11, 1894. 



4. Some specimens without date bear numbers of the Woman's College of Balti- 

 more. They were collected by Mr. Arthur Bibbins. 



5. Mr. Bibbins made a collection from Covington and Clement streets in 1895 

 for the Woman's College. 



6. At the Baltimore Terra Cotta Works, the clay for wliich is obtained from 

 the Federal Hill region, Mr. Bibbins obtained many specimens for the Woman's 

 College from 1898 to 1900. 



7. Mr. Bibbins made a collection from Covington and Clement streets in 1898 

 for the Maryland Geological Survey. 



8. The largest collection is that of Mr. Bibbins, from the streets last named, 

 for the State Survey, the labels of which bear date February, 1899. 



The following species occur in all these collections: 



Acrostichopteris longipennis Font 57 specimens. 



Acrostichopteris parvifolia Font 19 specimens. 



Adiantites parvifolius Font. n. sp 1 specimen. 



Brachyph)dlum crassicaule Font .3 specimens. 



Celastrophyllum latifolium Font 12 specimens. 



Celastrophyllum ? marylandicum Font. n. sp 1 specunen. 



Celastrophyllum obovatum Font 17 specimens. 



Cladophlebis alata Font 1 specimen. 



Cladophlebis Browniana (Dunk.) Sew 2 specimens. 



Equisetum marylandicum Font. ? 1 specimen. 



Leptostrobus longifolius Font 2 specimens. 



Menispermites tenuinervis Font 4 specimens. 



Menispermites virginiensis Font 1 specimen. 



Nageiopsis angustifolia Font _ 8 specimens. 



Nageiopsis heterophylla Font 4 specimens. 



Nageiopsis longif olia Font. * 2 specimens. 



Plantaginopsis marylandica Font. n. sp , 5 specimens. 



Protesephyllum dentatum Font 15 specimens. 



Proteaephyllum Uhleri Font. n. sp 1 specimen. 



Sphenopteris latiloba Font. ? 1 specimen. 



ThjTsopteris elliptica Font. 1 1 specimen. 



Thyrsopteris Meekiana Font 1 specimen. 



Thyrsopteris Meekiana angustiloba Font 1 specimen. 



Thyrsopteris pachyrachis Font 5 specimens. 



