W. Reimer 1949 Journal 22 oct. Calif, Contra Costa Co. all specimens marked the same. From the small area in which all animals have been marked thus for a radiating series of boards, as litter, will be arranged so that the wandering and dispersion habits of these animals may be ascertained. Boards are to be placed in a series of arcs about this central point with each arc roughly 30 feet from its neighbors. Placement of such boards has been started. Each animal recaptured other than at the center of this radiating system will be assigned individual markings. 29 oct. Only a short period spent in Pinchurst area. Pool beneath drain pipes only 3 ft. square now; 7.6°, water ; 10.0° C, air. Temp. at 0900 hours. Considerable time spent painting coordinate numbers on boards about study area. At the Lafayette area handled 165 animals, all from under single board. 5 Nov. At Pinchurst noted that pool below drains only about 1 foot in diameter and a very few (6?) weak larvae