218 The Mesozoic Series of NeiD Mexico. — Marcou. 
the Tucumcari area. I followed the continuity of its strata 
with great care on account of a few denundations, to Los 
Estaros, Man of War butte, canon Blanco, and the upper part 
of the mesa above Cuesta, San Miguel and opposite Pecos vil- 
lage. As to the Triassic system, I travelled over its strata, 
almost uninterruptedly, except a few spots of Neocomian and 
Jurassic, from the west side of the Delaware ridge to the old 
Pecos church ; that is to say, a distance of 550 miles. 
My observations can easily be controlled and followed, by 
means of my papers and my geological maps ; while until now 
Dr. Newberry has failed to show dicotyledonous leaves in my 
Jurassic yellow sandstone four miles northeast of Galisteo, 
and at the top of the mesa above Pecos. Dr. Newberry has 
also failed to show in any way the existence of the Gryphcea 
pitcheri ^of the Neocomian of Texas and Indian territory which 
he says he found "a few feet below the Ftychodus v^hipplei'^ 
near Galisteo and at Naciniento mountains associated with 
Ostrea congesta and Inoceram,us prollematicus ; and finally 
he has completely failed to prove that he has "shown Marcou's 
so-called Jurassic to be Cretaceous." On the contrary Capt. 
C. E. Dutton in his "geological map of northwestern New 
Mexico {Sixth Ann. Rep. U. S. Geol. /iS'i^rv., plate xiv. p. 128, 
Washington, 1885)" kas followed my geological map of 1853, 
mapping and coloring as Jurassic, all the road I followed and 
a yellower brown sandstone. "The vegetable remains * * * have 
been investigated by Dr. Newberry, in whose report the reader will 
find them fully described and illustrated." JSothing of the kind 
exists in the report. The white and yellow sandstone of the canon 
Blanco and of the Mesa-wall north of Galisteo, do not contain 
dicotyledonous leaves ; and the existence of them in my Jurassic strata, 
as well as the existence of the typical G. pitcheri of the Indian territory 
Neocomian does not rest on any proved facts. All is imagination. 
'■^To my knowledge the name Oryphxa pitcheri has been applied 
wrongly to five different species of Gryphxa, which have absolutely 
nothing in common with it. Like all the Gryphivx, the G. pitcheri 
varies in certain extreme limits, due to age, condition of preservation, 
and adherence of the lower valve, but retaining always the main 
characteristic of the species, which consists in having the beak of the 
lower valve — if not completely obliterated by adhesion — always com- 
pressed laterally more especially on the left side. Two of these false 
G. pitcheri exist in Texas, a third is fie G. dilatata var. tucnmcarii, a 
fourth is the G-Vyp/(a.'a related to G. calceola of Covero, and the fifth has 
been figured by Dr. C. A. White, in Wheeler's Palxontoloyy, part i. 
vol. IV. plate xvir. p. 171. As to the Gryph:va so often quoted and 
referred to G. pitcheri by Dr. Newberry, it is impossible to know what 
it was, as I have said in my note "The'original locality of the Gryph.ra 
pitcheri'' (Amer. Geologist, "March, 1889, vol. ii. p. 188). — A monograph 
of the American Gryphcea is in prepai'ation. 
