March 1-1924. Tucson. Saturday. With Stroganow and his students went out to the isolated dip near Picacho de Caleña. The dip is a syncline pitching about 20° to the N. about 20° W. It is an isolated men separated from the two dips that made up the Picacho by bolsons. All in limestone with a few zones of hardened sandy shales or even by greenish shales. The li, are thick bedded from Total thickness seen 400 or more feet; 350 measured. 2 to 20' at a time. The fossils are common though few good ones rather not as pseudomorphs. All in regulative Pennsylvanian with Phlebo camaratus, A. rodmontanus, A. g. striatus, Productus semireticulatus, P. punctatus, P. scabriculus a setta nebrocensis, Crayinifera Impiripinus?, Martinia perplexa, Embrocelia planconvexa, Compria suttilita, Campo- phyllum torquium, Chaetetes millacraecus, Stenofna sp., Archaeocidaris sp. in's and plates, thick spiny plates of Crinoids, Phipidomella pecor. It was interesting in places to see the li. weather ing into small rounded balls from 1 to 4 inches, the