89 



Section of the Cretaceous Strata in Texas. By Dr. B. F. Shumard. 



CnARACTERISTIC FOSSILS. 



Capriua Limestone, 



Caprina, Cytherea, and Ammonites. 



Comanche Peak 

 group. 



300 



to 



400 



Exogyra Texana, Gryphoea Pitcheri, Janira 

 occidentalis, Cardium multistriatum, C. Texa- 

 num, Pholadomya Sancti-Sab^e, Lima Wacoen- 

 sis, Ammouites acuticarinatus, A. Pedernalis, 

 Scoiaria Texana, Phasianella tumida, Kerinea 

 acus, Toxaster Texanus, Holectypus planatus, 

 Cyphosoma Texana, and Diadema Texana. 



Austin Limestone. 

 (Fish-bed.) 



100 



to 



120 



Gryphoea vesicularis, Exogyra costata, Ostrea 

 anomiaeformii!, Kadiolites Austinensis, Nauti- 

 lus DeKayi ? , BacuJites anceps, Hemiaster per- 

 astatus. Lamna Texaiia, Corax heterodon 

 (falcatus), Mosasaurus. 



Indurated blue Marl, or i 



1 60 

 Exogyra arietina Marl. 



Exogyra arietina, Gryphoea Pitcheri, Janira 

 Texana, Dentalia. 



"Washita Limestone. 



100 



to 



120 



Gryphoea Pitcheri {common var. and var. G. 

 Tucumcarii) G. sinuata, Marcou (not Sowerby), 

 Ostrea subovata {O. Marshii, Marcou), O. cari- 

 nata, Janira Texana, Inoceramus problemati- 

 cus. Ammonites Texanus, A. Brazoensis, 

 Hamites Fremonti, Kautilus Texanus, Holas- 

 ter simplex, Toxaster elegans. 



Blue Marl. 



Caprotina Limestone. 



50 



Inoceramus problematicus, Ostrea, Plicatula, 



scales and teeth of fishes. 



55 



Orbitolina Texana, Panopcea Xewberryi, 

 Cardium Brazoense, Area Proutana, Phasani- 

 ella perovata, oSeriuea, and Caprotina Texana. 



Arenaceous group. 

 (Fish-bed.) 



Marly clay, or Eed 

 Eiver group. 



80 



150 



Ostrea congesta, O. bellarugosa, Lucina, 

 Plicatula. 



Lamna Texana, L. compressa, Ptychodus 

 mammilaris, Galeocerdo pristodoutus. 



Ammonites Swallovii, A. Meekianus, Ancy- 

 loceras annulatus, Scaphites vermiculus, Bacu- 

 lites gracilis, Cytherea Lamarensis, Kucula 

 Haydeni, Corbula Graysonensis, Inoceramus 

 capulus. 



I hope Dr. Shumard will pardon me for disagreeing with his views ; 

 and I recognize with pleasure, with Mr, Meek, that his exploration 

 in Texas makes liis memoir an important one, " entitled to great 

 weight." He gives freely his opinion on my Pyramid Mount section, 



