EL Kadelium 1955 Buffo Goose Feb. 22 "Rat Island", 4 mi. W San Rafael, Marin Co., Caly. fragments of avian bones, possibly some small mammals (a number collected). Lewin kept digging in middle of depression, churned fine silt down to inches. Definite fine strata noted. Another shell mound at extreme opposite end AB quadrants. Another depression 12' x 8' x 16" maximum depth. not a fine silt like other depressions but some porous shell deposit. Vic pointed out an interesting rodent burrow at SE edge of this depression. Pile of cuttings noted 1953 in front of hole. It cuts into 60° sloping bank, opening 5" wide 4" high at mouth. Slopes inward and downward 20°, gives in about 8-10" and then forks 4'-forkbin, opening partially occluded by grasses, and dirt berged out to the forkbin at base while sloping down to bottom of sink. Lewin set traps in front of it but never got any mammals or trods. No mice have taken this half of island. Duck hunters have dug a 4' x 8' x 3' pit for a blind in quadrant A. No signs of insect or other life at bottom of pit. Phototypic picture this: 2 brush-eys loafing out, leaves to 2" length. New buds opening in poison oak but not burst. [A]marrhinia to 6" height, other grasses to 4-5". Vertebrates observed were Hermit thrush, 2 Song Sparrows, or ? junco. The thrush shows extreme territoriality as four of us got within 5-6 feet of it. Of course,