2 adjectives to describe desiderata

The late Sir Clements Markham, literary and historical successor of the author of "The Conquest of Peru," had called attention to this unexplored lake in one of the publications of the Royal Geographical Society, and had named a bathymetric survey of Parinacochas as one of the principal desiderata for future exploration in Peru.

Of the three proverbial desiderata, it is as easy to be healthy as to be wealthy, and much easier than to be wise, except so far as health and wisdom mean the same thing.

2 adjectives to describe  desiderata