612 



INDEX. 



'Page. 



Poiomac formation, naming of W2 



i>ocurronoe of 356 



plates sliowing I,X X I \'-I A X I X 



region of, map of I'l IX XX 



silit'ifud lignite and wood in 3(i2 



stnuigrapliy of ;!77-3"9, 47s 



study of, history of 342-103 



Ste alfo Potomac group: Older Polomai' formation. 

 rotomac formation, Lower. S<f Older Potomac. 

 Potomac formation in Marylami and Virginia, com- 

 parison of S'S 



Poiomac group, taxonomy of -112 



Potomac River, reconnaissance of 361 



Powell, J. W., Sbinarump formation named and de- 

 scribed by 1 ' 



Priconodon 392 



Proctor Creek, Va.. stratigraphy of 3X0 



Protea-phyllum Fontaine 219, 207 



californicum Font 207,271; PI. LXIX, Fig.ll 



dentatum Foil t 5.57, 



.■h9,5«3-o64, 509,.i94,,W0; Pl.CXVIll, Figs.3,4 



oblongifolium Font 53.H. .t43. 5,%. .')94 



ovatum Font .'ilO,.')38,.W6 



reniforme Font 491,580 



Uhleri Font 5,57, 



.5S4-565, .5«6, 594-5ft5; PI. CXVIII. Fig. 5 



Proteacese 267 



Protealcs 267 



Pryor, B. P., information from 273, 274 



Pseudofrenelopsis Nathorst 170 



Feli.xi Nath 340, 579 



Plcridophyta 54-88, 15.5-105, 224-243, 286-303 



Pteris Albertsii (Dunk.) Heer 219-220 



/rjyidaHecr 09,220 



haiburnenm (L. & H.) Ett 71 



insigtne (L. & H.) Ett 09 



Wjala (Phill.) Ett 09 



lonffipeimig Heer 09 



Pterophyllum Brongniart 97-104,2.54-2.55 



abielinum Giipp 250 



aquale (Brongn. ) Nath 99, 



100-101, 118, MO, 144: PI. XX 



%quale rectangulare Nath 100 



ala.sken.sc Font 152; PI. XXXVIII, Figs. 19, 20 



Braunsii Schenk 522 



Brongniarti Morr 252-2.53 



Buchianum Ett 244,249 



calif orn icuiii Font 2.52-2.53 



Ct.nptum (Phill.) h. & H 94-95 



conciiinnni Heer 252-2.53 



contiguum .Schenk .... »9, 140, 143; PI. XIX, Figs. 7-11 



? cteniforme Nath 110 



(luhimn Brongn 100 



iJuitkcrianum Gopp 243-244 



Jakalum (L. & H.) Sandb 113 



Helmersenianum Heer 94 



Jiegeri Brongn 101 



? lowryanum Ward .... 254-255, 271; PI. LXVII, Fig. 9 



Lyellianum Dunk 256,308 



Medlicottianum Oldh. & Morr 522 



minus Brongn.? 104, 140141; PI. XXI, Figs. 8, 9 



Morrisianum Oldh. & Morr 522 



Nathorsti Schenk »7-»», 



100, 104, 140, 143; I'l. XIX, Figs. 1-6 



Nilsoni L. & H 104 



pecten (Phill.) L. & H 98 



Page. 



Pterophyllum princeps oldh. .fc Morr 522 



rajmahalcnse Mor 99, 



luo. 102-104, 140, 142. 144. 1.52: PI. XXI. Figs. 1-7 



rigidum Phill HO 



saxonicum Reich 245 



nrhailmhunjcitHi' Dunk 303, 304 



Snishini'iditiiin Heer 102-103 



H'illiiitiimnin Brongn 94 



Ptrruzamitfx mmpius ( Phill. I Schimr 95 



mnJor[]..& H.)Fr. lir 79 



ritlalus ( Brongn. ) Fr. Br 81 



Ptilophyllum aquale (Brongn.) Morr 100 



Ptilozamites Nathorst f*9-90 



Leckenbyi (Bean) Nath SiMIO, 



141). 143: I'l. XVI. Fig^. 1,2 



tj- 



Queen Charlotte Islands, fo.ssil plants from 2(i9-210 



geology of 210 



Queens Chapel road, D.C., fos.siI plantsfrom. 47.5, .527, .583-589 



Quercoithyllum chinkapinense Ward 510, 



.")i:!,586; PI. CXII. Figs. 3, 4 

 tenuiiierve Font 521, .526, 586, 594 



K. 



Ranales 268 



Rappahannock formation, age and correlation of. 3si, 403, 575 



fossils from 380, 478 



identity of James River formation and 478 



occurrence of 387 



Rappahannock River, section of 376 



Raritaii formation, correlation of 356, 398. .576, .598 



occurrence of 57.) 



Rauff. Hermann, Goniolina discussed by 3;<6-337 



Red Butte. Arizona, Mesozoie rocks at 17. 22 



petrified wood from 36 



section of 43, 44 



transition beds at 22,29 



Red Canyon Creek, section at 323-324 



Redwater Creek, stratigraphy of 380 



Reservoir, Washington. D. C, fossil plants from 380, 



475, 516-519, 583-.589 



Resin, fossil secretions of 34-36 



Reynold's ore pit, fossil plants from 544, .583-589 



Rhetic of Sweden, fossil plants from lOO 



RhodomeIace:e 154 



Rhodymenialcs 154 



Rice, Claude, .Jurassic jilauts collected by r)2,217 



Richardson, .lames, fossil beds discovered by 209 



Richmond, Fredericksburg & Potomac R. R., 72d mile- 

 post on, fossil plants from 480-481,682-589 



Riddles, Greg., fossil plants from.... 212-213,217,223,234,237 



Riverdale, Md.. fossil plantsfrom 475, .533. .583-689 



Roemer. Ferdinand, on Texas fossils 327-328 



Rogers, W. B.. on Potomac formation 346-347,352-354 



Rogersia aiigustif.ilia Font .. 491, 494,510,521, ,523,.526,.586,.594 



angusti folia parva Ftuit 52i, 



52:l, 526,586,594-595; PI. CXI, Fig. 9 



longifolia Font 238, 



511,521,52:S-524,,526,,538,580: PI. CXII. Fig. 9 

 Rolland, Mr. and Mrs. .). H., fossil trunk collected hy. 146 



Rosales 269-270 



Hosiers Blurt, Maryland, fossil plants from 372-374, 



475. ,527-.533, .583-689 



Ruftordia Seward 75-76 



Gffippcrti (Dunker) Sew. 7.'.-7«, 140,143; I'l. XII, Figs. 4-8 



