Jackstoro, Texas, Thursday March 23 1922 Left Graham at 6:47 A.M. for Jacks- town and got here at 8 A.M. Then walked 3 1/2 miles southeast on Rock Island Railway to a deep cut capped by limestone, followed Jackston beneath by noduliforms yellow anorthizing shale for about 10 feet, and then a blue sticky clay with occasional nodules and test prints that these are comparatively rare. More than 2/3 of the forms gotten come from the lower clays at all the formations dip to west. the eastern end of cut. The species appear to be common to both. Marginifera losallensis most common above, with Fusulina and Phylloidmella keeni, but several specimens of goniatites of this species. One of the specimens is fine. The horizon is in the Middle Jackston. Gummery Brooker 53-8. The limestone has shale layers filled with sometimes the shale limestone is made of them. Jura Camptophyllum Torquicum. They are held down from the Canyon series. There are several limestone horizons to the east of Jackstoro, and near the railway station here is a third zone of limestone. This day out for town. Dad and I have 60 species from the above locality but I doubt of share more than 45 forms.