154 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
Fifth, the Ammonites peruviana von Bucli is a very unusual 
form, collected by Alex, von Humboldt in Peru, in strata of doubtful 
age according to von Bucli, who, however, referred it to the 
Cretaceous. 
Sixth, the Cyprineria erassa Meek was referred erroneously by 
Meek and Newberry to the Fort Benton or Fort Union group of the 
Upper Cretaceous, far above the Dakota group. It was found by 
Newberry at Pope’s Well, New Mexico, just above the white and 
yellow sandstone of the Jurassic section of Pyramid Mount in the 
Tucumcari area, and mav be regarded as a New Mexican Jurassic 
fossil. 
Seventh, Trigonia Emory i Conrad is a Jurassic Trigonia. 
Eighth, Pecten texanus Rom., received from Mr. Dumble, proves 
to be Pecten quadricostatus Rom. The form is Neocomian in the 
Jura, but as Pectens are very numerous in all the Mesozoic forma- 
tions, this special form may have begun in America in the Jurassic 
series. 
Ninth, the Epiaster sp. ind. differs from E. Whitei Clark. In 
Europe it is an entirely Cretaceous genus, without the exception, so 
far as I know, of a single species found in the Jurassic. 
The other fossils sent me as Turritella and Ostrea subovata? are 
in a state of preservation not sufficiently good to determine with 
anything like exactness. 
As a resume and in conclusion I would say that the fossils collected 
in 5 b and 5c of the Kent section indicate an upper Jurassic fauna 
with only two forms belonging to the Neocomian in Europe. The 
majority and the most common of the species are Jurassic. As to 
the upper subdivision, 5a, it may be considered as a transition bed 
between the Jura and the Neocomian. I should classify it, however, 
as the uppermost bed of the Texas Jurassic series. I therefore dis¬ 
agree entirely with Messrs. Dumble and Cummins, both on paleon¬ 
tological grounds and in stratigraphy, and I continue to refer these 
beds of the Kent section to the Jura. 
I asked Prof. A. Hyatt to allow me to look at his large collection 
of fossils of the Tucumcari area, which he very kindly permitted. 
After a reexamination of all the species I found Mya, Pholadomya, 
Isocardia, Cardium, Area, Gresslya, Mactra, Cyprina, Trigonia, and 
Grypliaea Tucumcarii in great numbers, all Jurassic forms and 
recalling a characteristic upper Jurassic fauna. There is not a single 
ecliinoderm, but a very large Natica?, perhaps a Pliasianella, and a 
