Fossils op the Texas Cretaceous. 
87 
Tylostoma tumidi (Shumard), Edwards and Comanche Peak Lime- 
stones. 
Cephalopoda — 
Scaphites (several species not well studied). 
S 'chloenbachia leonensis (Conrad), Fort Worth Limestone. 
S. wacoensis (Roemer), Edwards Limestone. 
Nautilus texanus (Shumard), Fort Worth Limestone. 
Many Nauteloids are found in the Fort Worth Limestone and in other 
divisions of the Cretaceous. They vary in size from two inches in diam- 
eter to over a foot. Ammonites are also numerous, and they likewise 
vary in size, say from two inches in diameter to over two feet, while one 
large species from the Upper Cretaceous measures from three to six 
feet. 
7. The Vertebrates are represented in the Cretaceous by a number 
of species. I have collected within a radius of six miles from Waco 
examples of 
Clidastes , 
Ichthyodectes , 
Protosphyraena penetras , 
Oxyrhina extenta, 
Tiphactinus audax, 
Cimo liosaurus, 
Mosasaurus , 
Plesiosauras, 
Squalodouts , 
Cestraciont sharks. 
Besides numerous fishes as shown by the teeth and vertebrae found. These 
vertebrate specimens were sent by me to the U. S. National Museum, 
where they were studied by Dr. F. A. Lucas. The same forms have been 
found in Kansas and Dr. Williston, of the University of Kansas, and Dr. 
Lucas are of the opinion that the formations from which the Texas 
specimens were taken (Eagle Ford Shoals and Austin Chalk) are iden- 
tical with the Niobrara of Kansas. 
