The nature of this relatively straight point-to-point survey, covering wide latitudinal and longitudinal ranges, makes the data conducive to interpretation as a chainlike series of events. In the same way that a length of string can be cut up more ways across its axis than parallel to it, much of the data in this cruise is best presented in serial relationships showing variations along a line. A series of Tables has been constructed to demonstrate how this approach can express changes and other biological patterns of the birds under study. In general, the tables presented in this appendix differ somewhat from most tables in surveys which cover a more restricted area or track. A discussion of each table should clarify the meaning and significance. TABLE 1. Summary of Daily Observations In order to simplify other tables, each of the 13 days on which regular observations were made, was assigned a number (1-13). Note that no regular observations were held on 6 June; this was due to illness of the observer. The mean linear density is high due to the influence of day #7. Only two daily linear densities exceed the mean. The median daily linear density of 5.4 birds/linear mile is perhaps a better measure of the central tendency. The "approximate distance to land" column is relevant to the "major species" column: above 75 miles major species are Storm Petrels, Albatross, Phalaropes, and Gadfly Petrels, with Terns, Boobies and Shearwaters found closer to land. TABLE 2. Relative Abundance of Birds by Species All species were not seen each day, therefore the overall linear density for any species is lower than the actual density for the area in which the species was present. The average linear density for days of occurrence is obtained by dividing the total birds seen by the total miles for those days that the species was recorded. The quotient obtained by dividing the occurrence density by the overall density would give a measure of clumping or concentration tendency. Thus, a restricted form such as Cooks Petrel measures about 5 units on an artificial scale whereas "White-rumped" Storm Petrel measures approximately 1 unit. TABLE 3 presents a similar picture on a higher taxonomic level. TABLE 4. Species Contributing 1% or More to Total Birds This table gives a quick overall view of relative concentrations. Comparison with the occurrence rank again shows a relationship with clumping tendency. TABLE 5. Regularity of Occurrence This table is an expression of occurrence and measures both breadth of distribution or extent of range and regularity along the track.