Clapp, Roger 1964 7 Cat killing and insect collecting proceeded as usual. Forty-eight cats killed today. Huber found a number of interesting live shells a Cypraea lynx (alive, I think) which had a generally darker surface coloration than others of this species I have seen. He also found a number of money cowries which were about the maximum size (about 1 inch). Smaller specimens of this species appear to have a whitish cast to the shell while larger individuals have a pronounced yellowish color. Went out and banded masked boobies again this evening. Did 343. Birds now relatively hard to get but managed to finish second string; do third string, and 43 of Doug's bands in an enormous club (some 1100- 1300 birds) near the north end of the island. A number of these birds were color-marked from previous nights. Arose about 7:30 and went cat-hunting with Nick and Big Charlie. Saw relatively few cats four, which we got. One of the four was a kitten and I demurred at giving the final blow but Nick was only two glad' to oblige. Collected about seven Brown Booby eggs, (two singles, five eggs the fresher appearing of two) and three Masked Booby eggs. One of the latter was a "freak" egg only about 1/2 the normal size. In addition it lacked the usual chalky coating. It contained (when prepared) a normal yolk but the egg white appeared proportionately thicker.). These eggs plus all red-foot eggs collected on the 15th were all fresh. Along the northwest shore the reef (a short distance north of Millersville) has a large number of lat rocks which Nick and I examined for shells. Several live money cowrie were found (as well as what