than 1. centimatus. Also saw Sargin- thyrus pleues, fine Arginona. All of the fruits show mycos pseudo- maths. Learned nothing new today. Feb 24-28 Tucson, Lectured three days, walked around and read Cassens Atres de Alga- meire and Stratigraphischen Geologie. Feb 29, 1924. Tucson. Friday Spent the afternoon walking over the descending holm of Tucson northeast of the city and the University. The entire hlo son is clearly made up of the debris of the Santa Catalina Mts. Archeogric grains, (rein-quartz), apparently a little of Pinal ochist and Congric alike ared. Much of the material is in inches in diameter and