MARYLAND GEOLOGICAL SURVEY 767 



This species greatly resembles various forms from the Upper Cretaceous 

 of Greenland, which Professor Heer referred to the genus Pteris, the 

 resemblance to Pteris albertsii Heer being particularly marked. The 

 latter is usually referred to the genus Cladophlebis, and this genus con- 

 tains a number of forms that are comparable with Asplenium cecilensis. 

 The fertile pinnules of the latter, imperfect as is their preservation, are 

 clearly unlike those known in Cladophlebis and are clearly of a type 

 allying this form with the Aspleniece. 



Occurrence. MAGOTHY FORMATION. Grove Point, Cecil County. 



Collection. Maryland Geological Survey. 



ASPLENIUM DICKSONIANUM Heer 



Asplenium dicksonianum Heer, 1874, Fl. Foss. Arct., Bd. iii, Ab. ii, p. 31, 



pi. i, figs. 1-5. 

 Asplenium dicksonianum Heer, 1882, Ibidem, Bd. vi, Ab. ii, pp. 3, 33, pi. ii, 



fig. 2; pi. xxxii, figs. 1-8. 

 Asplenium dicksonianum Dawson, 1883, Trans. Roy. Soc. Can., vol. i, sec. 



iv, p. 11. 

 Asplenium dicksonianum Dawson, 1885, Ibidem, vol. iii, sec. iv, p. 5, pi. iii, 



fig. 1. 

 Asplenium dicksonianum Dawson, 1886, Ann. Rept. Can. Geol. Survey, n. s., 



vol. i, p. 76. 

 Asplenium dicksonianum Dawson, 1892, Trans. Roy. Soc. Can., vol. x, sec. 



iv, p. 91. 

 Asplenium dicksonianum Lesquereux, 1892, Mon. U. S. Geol. Survey, vol. 



xvii, p. 24, pi. i, fig. 1. 



Asplenium dicksonianum Ward, 1894, Jour. Geol., vol. ii, pp. 259, 261. 

 Asplenium dicksonianum Newberry, 1896, Mon. U. S. Geol. Survey, vol. 



xxvi, p. 39, pi. 1, figs. 6, 7; pi. ii, figs. 1-8; pi. iii, fig. 3. 

 Asplenium dicksonianum Ward, 1899, 19th Ann. Rept. U. S. Geol. Survey, 



pt. ii, p. 704, pi. clxx, fig. 1. 

 Asplenium dicksonianum Fontaine, 1899, Ibidem, p. 664, pi. clxii, figs. 6-8 



(non Fontaine, 1888). 



Asplenium dicksonianum Kurtz, 1902, Cont Palseophyt. Argentina iii, Re- 

 vista Museo La Plata, vol. x, p. 49 (1899). 

 Asplenium dicksonianum Berry, 1911, Bull. Torrey Bot. Club, vol. xxxviii, 



p. 409. 

 Asplenium dicksonianum Berry, 1911, Bull. 3, Geol. Survey of New Jersey, 



p. 68, pi. v, figs. 3, 4. 



Description. " A. foliis triplicato-pinnatis, stipite firmo, rigido ; pinnis 

 primariis secundariisque ovato-lanceolatis, pinnulis anguste lanceolatis, 



