TYPE SPECIMENS OF FOSSIL PLANTS. 169 



12. Dryopteris arguta (Xesquereux ) Knowlton. Type- 



Denver (Cret.). Golden, Colorado. 



Knowlton, Bull. No. 152, U. S. Geol. Surv., 1898, p. 91. 



See L,astrea arguta. Also Aspidium lakesii (33641- 

 33643), Sphenopteris lakesii (15), and S. membra- 

 nacea (11). 



3374. Dryopteris cystopteroides (Fontaine) Knowlton. Type. 



Potomac (IyOW. Cret.). Fredericksburg, Virginia. 

 Knowlton, Bull. No. 152, U. S. Geol. Surv., 1898, p. 91. 

 See Aspidium cystopteroides. 



3437. Dryopteris dentata (Fontaine) Knowlton. Type. 



Potomac (L/Ow. Cret.). Banks of Dutch Gap Canal; hill- 

 side near Potomac Run; near telegraph station, Vir- 

 ginia. 

 Knowlton, Bull. No. 152, U. S. Geol. Surv., 1898, p. 91. 

 See Aspidium dentatum. 



3967. Dryopteris elliptica (Fontaine) Knowlton. Type. 



Potomac (L,ow. Cret.). Hillside near Potomac Run; bank 

 near Brooke, Virginia. 



Knowlton, Bull. No. 152, U. S. Geol. Surv., 1898, p. 92. 



See Aspidium ellipticum. 



3913. Dryopteris fredericksburgense (Fontaine) Knowlton. Types. 

 3346. Potomac (L/Ow. Cret.). Fredericksburg; and near tele- 



3325. graph station, Virginia. 



Knowlton, Bull. No. 152, U. S. Geol. Surv., 1898, p. 92. 



See Aspidium fredericksburgense. 



7689 Dryopteris? gleichenoides Knowlton. Types, 



to Esmeralda (Neocene). Esmeralda County, Nevada, 3.8 



7691. kilometers northeast of Emigrant Peak. 



Knowlton, Twenty-first Ann. Rept. U. S. Geol. Surv., Pt. II, 1900, 

 p. 2ii, pi. 30, figs. 5-7. 



3268. Dryopteris heterophylla (Fontaine) Knowlton. Type. 



Potomac (L,ow. Cret.). Fredericksburg, Virginia. 



Knowlton, Bull. No. 152, U. S. Geol. Surv., 1898, p. 92. 

 See Aspidium heterophyllum. 



7615. Dryopteris idahoensis Knowlton. Type. 



Payette (Miocene). One mile southeast of Marsh Post- 

 Office, Boise County, Idaho. . 



Knowlton, Eighteenth Ann. Rept. U. S. Geol. Surv., Pt. Ill, 1898, 

 p. 721, pi. 99, figs. 1, 2. 



6934. Dryopteris kennerlyi (Newberry) Knowlton. Type. 



Puget Sound (Cret.). Nanaimo, Vancouver, British Co- 

 lumbia. 

 Knowlton, Bull. No. 152, U. S. Geol. Surv., 1898, p. 92. 

 See Aspidium kennerlyi. 



