Mortality among the chicks in 1940–41, which was a good, dry season, did not appear to be very great. Four of the 25 chicks under observation died. One succumbed owing to an excessively wet burrow, another from starvation as a Skua ate the parent, a third which was in a very shallow burrow probably also fell a victim to a Skua, and a fourth died from unknown reasons. In 1941–42, also a dry season, of the 76 chicks that were under observation in burrows during their whole period ashore, only six did not leave the island. All of these, for some reason unknown to me, either died in the burrow or disappeared during the first two weeks. None of these chicks died when older than two weeks. Parent and Chick. In this section some observations concerning the interesting relations of parent and chick will be discussed. Parents spend very little time with their chicks in daylight hours, during which period they are sometimes fed. Table V deals with observations taken in 1940–41 only. Table V. Appearance of Adult with Chick in Early Stages. Parent in Charge Age of Chick in Days Nest 22 Nest 29 Nest 8 Nest 9 Nest 12 Nest 12a 1st No. 2 No. 22 No. 31 No. 33 No. 36 No. 34 HE HE HE HE HE HE 2nd No. 6 No. 22 No. 31 No. 15 No. 36 No. 34 ? FN FN FN FN FN NFD FD NFD FD NFD 3rd None None None No. 33 None None NFN FN NFD FN FN NFN NFN 4th No. 6 No. 22 No. 32 No. 36 No. 34 FN FN FN FN FN FD NFD FD FD NFD 5th None No. 33 None FN FN FN FD 6th No. 8 No. 34 FN FN FD NFD 7th None NFN 8th No. 35 FN NFD Key.—HE, hatched that evening; FN, fed during previous night; NFN, not fed during previous night; FD, fed during day; NFD, not fed during day. In the foregoing table is given the occurrence of the parent with the chick in the daytime during its first few days of life. After the occasions listed in the table the parent was never found again with a chick during the day. It will be noticed in all cases that the chick was hatched late in the day, the earliest being that at No. 9 nest, which appeared just before 8.30 p.m. In all the examples given the chick was fed presumably by the parent in charge before 9 o'clock next morning, while in two cases out of five it was fed during the day as well. My method of discovering these facts as well as others