NO. 8 GRAND CANYON FOSSIL FOOTPRINTS GILMORE 1 5 



tion in size, and in ventral appendages, quite sufficient perhaps to 

 account for most of the trails found/ 



While I have no intention of giving a detailed description of these 

 recently discovered trails, a few of the more characteristic specimens 

 are illustrated here, especially those that ditfer from the trails puh- 

 lished by Walcott, and these figures tell the story of the kinds found. 



The discovery of these trails in the Tapeats of the Bright Angel 

 section is especially interesting as recording a fourth track-l)earing 

 horizon in this one geological section. 



A CORRECTION 



In the faunal list of tlie Coconino, Smithsonian Misc. Coll., Vol. 80, No. 3, 

 1927, p. 4, a third species of Agostopus. A. robustus is listed. This name was 

 inadvertently included, hut it has no standing and should therefore be dropped 

 from further consideration, as a nomcn nudiini. 



Attention is also called to the misspelling of the species Hylopus hcnnitanus 

 in the same publication. In the list of Hermit ichnites, page 7, H. hcrmitus, and 

 on page 78, H. hcnuitcnsis both should be Hylopus licnnitanus Gilmore. 



' Idem. p. 175. 



