186 CATALOGUE OF THE CRETACEOUS AND [bull. 152. 
Protophylluni querciforme Hollick. Bull. Torr. Bot. Club, vol. xxii, 
p. 227, pi. ccxxxvii, f. 1, 1895. 
Dakota group : Fort Harker, Kansas. 
Protophyllum rugosum Lx. Cret. Fl., p. 105, pi. xvii, f. 1, 2; pi. xix, 
f. 3, 1874. 
Pterospermites rugosus Lx. Ann. Rept. U. S. Geol. and Geogr. Surv. Terr., p. 
426, 1872 [1873]. 
Dakota group: South of Fort Harker, Kansas 5 Coal Brook, North- 
west Territory. 
Protophyllum Sternbergii Lx. Cret. Fl., p. 101 , pi. xvi ; pi. xviii, f. 2, 
1874; Fl. Dak. Or., p. 189, pi. xlii, f. 1, 1892. 
Pterospermites Sternbergii Lx. Ann. Rept. U. S. Geol. and Geogr. Surv. Terr., 
p. 425, 1872 [1873 J. 
Dakota group : Fort Harker, Kansas. 
Protophylluni? trilobatuin Lx. Bull. U. S. Geol. and Geogr. Surv. 
Terr., vol. i, p. 397, 1875 [187G]. [Apparently not afterward recog- 
nized. 
Dakota group : Kansas. 
Protophyllum undulatum Lx. Fl. Dak. Gr., p. 189, pi. xlii, f. 2, 1892. 
Dakota group : Kansas. 
Protophyllum sp., Dn. Trans. Boy. Soc. Canada, vol. xi, sec. iv, p. 
63, pi. xi, f. 40, 47, 1893 [1894]. 
Upper Cretaceous: Port McNeill, Vancouver Island; Nanaiino. 
PRUNUS (Tournefort.j Linnaeus. Syst., ed. i, 1735. 
Prunus ? acutifolia New by. Fl. Amboy Clays, p. 90, pi. xiv, f. 1 , 1895 
[1896.] 
Amboy clay: Wood bridge, New Jersey. 
Prunus (Amygdalus) anteoedens Lx. Fl. Dak. Gr.. p. 144, pi. Iv, f. 
4, 1892. 
Dakota group : Kansas. 
Prunus caroliniana (Mill.) Ait. Hort. Kew., ed. i, vol. ii, p. 163, 1789. 
Prunus caroliniana Michx. Lesquereux, Am. Journ. Sci., vol. xxvii, p. 363, 
1859; Geol. Tenn., p. 427, pi. K, f. 0, 1869. 
Pleistocene?: Sornervilie, Fayette County, Tennessee. 
Prunus cretacea Lx. Am. Journ. Sci., vol. xlvi, p. 102, 1868. 
Dakota group: Lancaster County, Nebraska. 
Prunus dakotensis Lx. Cret. and Tert. Fl., p. 237, pi. xlvi A, f. 8, 
1883. 
Fort Union group: Bad Lands, Dakota. 
Prunus Parlatorii (Heer) Lx. = Andromeda Parlatorii. 
Prunus variabilis Newby. Proc. U. S. Nat. Mus., vol. v, p. 509, 1882 
[1883]. 
Eocene?: Cook Inlet, Alaska. 
PSILOTITES Goldenbei g. Fl. Sarsepontana Foss., heft i, p. 13, 1855. 
Psilotites inermis (Newby.) Schimp. Pal. Veg., vol. iii, p. 547, 1874, 
Psilotum inerme Newby. Later Extinct Floras, p. 38, 1868. 
Fort Union group: Fort Union. 
Psilotum inerme Newby. =Psilotites inermis. 
