250 Systematic Paleontology 



The present species is very common at certain localities^ both in the 

 Patuxent and Anindel formations, and although it apparently survives 

 during the deposition of the Patapsco formation it is less common. Out- 

 side of the Maryland- Virginia area remains of this species have been re- 

 ported from the Shasta beds of California, and from the Kootanie of 

 Montana and British Columbia. Seward (Fossil Plants, vol. ii, 1910, 

 p. 340) refers the bulk of Fontaine's figures of Cladophlehis virginiensis 

 Font, to Todites Williamsoni (Brongniart), a widespread older Jurassic 

 species, but this reference has no justification. OladopMehis Nathorsti 

 Yokoyama,^ from the Neocomian of Japan, is very close to the Potomac 

 species. 



Occurrence. — Patuxent Formation. Fredericksburg, Dutch Gap, 

 Potomac Eun, Virginia. Arundel Formation. Arlington, Maryland. 

 Patapsco Formation. Vinegar Hill, Maryland; Chinkapin Hollow, 

 Virginia. 



Collections. — U. S. ISTational Museum, Goucher College. 



Cladophlebis parva Fontaine 

 Plate XXVIII, Figs. 1, 2; Plate XXX; Plate XXXI 



CladophleMs parva Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 1889, 



p. 73, pi. iv, fig. 7; pi. vi, figs. 1-3. 

 CladophleMs sp., Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv, 1889, p. 81, 



pi. xxvi, fig. 15. 

 Aspidium heterophyllum Fontaine, 1890, Mon. U. S. Geol. Surv., vol. xv. 



1889, p. 96, pi. xiv, figs. 1-5; pi. xv, figs. 1-5. 

 CladophleMs inclinata Fontaine, 1894, in Diller and Stanton, Bull. Geol. 



Soc. Am., vol. V, p. 450. 

 CladophleMs inclinata Fontaine, 1896, in Stanton, Bull. U. S. Geol. Surv., 



No. 133, p. 15. 

 Aspidium heterophyllum Fontaine, in Diller and Stanton, loc. cit. 

 Aspidium heterophyllum Fontaine, in Stanton, loc. cit. 

 Dryopteris heterophylla Knowlton, 1898, Bull. U. S. Geol. Surv., No. 152, 



p, 92. 

 CladophleMs parva Fontaine, 1899, in Ward, 19tli Ann. Rept. U. S. Geol. 



Surv., pt. ii, p. 657, pi. clx, fig. 18. 

 Dryopteris heterophylla Fontaine, 1906, in Ward, Mon. U. S. Geol. Surv., 

 • vol. xlviii, 1905, pp. 483, 550, pi. cxv, figs. 7, 8. 



^Yokoyama, Journ. Coll. Sci., Imp. Univ., vol. vii, 1895, p. 220, pi. xxviii, 

 figs. 3, 4, 10, 11. 



