Fossil Footsteps. 175 



the liberty to subjoin a catalogue of all the species hitherto discov- 

 ered, according to a more comprehensive arrangement, which further 

 discoveries have rendered necessary. And even the classification 

 which I now propose, will probably require other modifications. 

 I arrange all the footmarks under the general term 



IcHNiTES, (i^vos and Xi^o^.) 



The subdivisions are three. 



1. Tetrapodichnites, (rsTpa^sj, &z;c.) 



*T. didactylus. On graywacke, New York. 



2. Sauroidichnites, (rfaupo?, siSog, &;c.) 



*S. Barrattii. Dedicated to Dr. Joseph Barratt of Middletown, 

 its discoverer. Toes, five. 



S. palmatus. (Ornithichnites palmatus of my first paper.) 

 *S. minitans. 



*S. polemarchius, (■roXsfji-app^sio^.) 

 *S. tenuissimus. 



3. Ornithichnites. 



(1.) Pachydactyli. 



O. giganteus. 



O. tuberosus. 

 *0. parvulus. 



*0. parallelus. (O. tuberosus, a dubius of my first paper.) 

 *0. divaricatus. 

 *0. cuneatus. Discovered and named by Dr. Barratt. 



(2.) Leptodaciyli. 

 O. ingens. 

 *0. robustus. (O. ingens, a minor of my first paper.) 

 O. diversus. 

 a clarus. 

 ^ platydactylus. 

 *0. Deanii. Dedicated to Dr. James Dean of Greenfield. 

 *0. tenuis. 



O. minimus. 

 *0. crassus. 

 *0. minusculus. 



O. tetradactylus. 

 *0. gracilis. 



