Tucson, Jan. 16-1924. Wednesday. Entire morning on the Foram paper. In the afternoon walked out to the Univ., and at 4 P.M. we are off in a Univ. car 1/5 miles N.-W. on the Lilron Bell Road, and then through (=Pichaer delg Calayia) a gap about 2 tr 3 miles W. to a mountain farmy at the base Purial schist (= Archeozoic), on which lies a third series of Cambrian quartzite. Then follows 100 tr 200 ft. of thin and thick bedded limestone with some sandy li. and apparently some shale joints between the li. Some of these li. are done like lithographic stone but most of it more a less granular. These granular layers are replete with communal trilites, small Lingulellas, and Acrotreta. I would not be surprised if a fauna of 50 species exists here, but it will take much pounding to get identifiable specimens. Much of the tillite payments are the thick part like the spines of the free cheeks and the doubt- lure portions. But still no, free cheeks and tails are not rare. There is also apparently much