228 R. T. Hill—Outlying Areas of the Comanche 
The vertebrata from these beds strikingly resemble those 
described by Williston and Cragin from the Belvidere beds of 
Kansas with the exception of two species of Pycnodont fishes 
belonging to the genera Uranoplosus and Ceelodus, for which 
this is a new horizon.* 
Concerning these vertebrates Prof. Copet remarks : 
“The three species of Pycnodont fishes were new to science, 
and they have a Lower Cretaceous facies. Plesiosaurus is repre- 
sented by dorsal vertebrz only, but these are not of the Upper 
Cretaceous type. I have never found Lepidotid fish remains in 
the Upper Cretaceous of North America, while they are charac- 
teristically Lower Cretaceous and Jurassic in Europe. The only 
occurrence of Lepidotid fishes so far recognized in North America, 
is based on some teeth sent by Mr. Charles H. Sternberg in the . 
Dakota sandstone of Kansas, and on the new species, Macrepistius 
arenatus, from the Trinity bed of Texas discovered by Prof. 
R. T. Hill. (See Journal of the Academy Natural Science, Phila- 
delphia, vol. ix, Part 4). The crocodilion remains are undeter- 
minable.” 
From the molluscan species it will be seen that these beds 
paleontologically more resemble the Washita division than the 
Fredericksburg. Furthermore, they show the same general 
association of molluscan species as do the Belvidere shales, and 
like them differ from the beds of the Central Texas region by 
containing vertebrates. That they are a southern extension of 
the Belvidere beds there can be no reasonable doubt. 
The Comet Creek Bed.—Little is known concerning the iso- 
lated remnant of the Cretaceous formations at Comet Creek, 
in G county, Oklahoma, the only locality of the Comanche 
Cretaceous recognized as having been seen by Prof. Jules 
Marcou in his journey with the Pacific railway explorations.{ 
According to this author this locality consists of a single stratum 
of “Grypheate limestone” “five feet thick” containing one 
fossil species, the G. pitcherz of Marcou. This species has been 
found elsewhere only in the Washita division and is espe- 
cially abundant in both the Belvidere shales of Kansas and the 
Preston beds of Texas. This is the fossil which Prof. Marcou 
figures so well as Gryphaa pitchert § Morton, but for which he 
himself later suggested the more appropriate name of G. 
*The species of the genus Mesodon from Texas described by Prof. Cope with 
these fishes, as coming from Texas, belong to the Trinity division.—See New and 
Little Known Paleozoic and Mesozoic Fishes, Journal Academy of Natural Sci- 
ence, vol. x, Philadelphia, 1894. 
+ Proc. Phila. Acad. of Nat. Science, loc. cit., 243. 
t See Geology of North America, p. 17. 
§ He says, Geology of North America, page 38: ‘The drawings are very exact. 
and, were done from nature by Humbert, the most skilful artist for fossils in 
aris. 
