Matter has listed an Atoka fauna (A.J.) other than Ostrin Inida and in it are several species of Lestirinus. Accordingly I cannot give or much value to the goniatites seen in the fossil portion of the Capanne series. In any event Monroe, Raphnela Meadle Falls, Smithwick are all closely related faunas in seas with limestone tendencies. The Atoka and related Lajins begin the cycle of quick deposition of muds and sands throughout northern Texas, southeastern Oklahoma, and Arkansas south of the Arkansas River. There is said to be a break between these two series of deposits and if there in them can be no great significance attached to it, it may be that the difference maybe explained by a marked climatic change. One passing from a semi-arid to pluvial conditions, with the greater abundance of water with the appearance of greater inland seas, the agglutination of the sands would be worked out to sea and cause the more rapid deposition seen in the Atoka, Mann and related formations.