but which is partly still Pennsylvania in time. Then comes the Kaibab fauna of the Grand Canyon and S.E. Arizona. Strzyann is now a full Professor. Last summer he worked in Mexico for two months for the De Beitz Co and was paid d$1000. The most interesting thing he told me that the fauna of the Los Mocheros area began with a conglomerate that directly overlies the granite. Seemed to think that the De Beitz Co. was not anxious to learn much of the geology but pattern was really on display for his friend Gilles. Martin was also in the same area doing all his work from a hotel, reading his Alaskan Crustacean reports and trying to apply it to the Coats of Mexico. The De Beitz Co are said to have had 30 cars in northern Mexico and as many guayguits. Strzy- ann thinks the whole northern area of Central Mexico has little chance for oil.