The only observations, so far as I am aware, that have been made on the pitchers of Nepenthes seedlings, are those by Sir J. D. Hooker, who, in 1859, described their external configuration in his paper “On the Origin and Development of the Pitchers of Nepenthes, &c,” in vol. xxii. of the Linnean Society's Transactions, and afterwards added a few details of anatomical structure, in his admirable address on Insectivorous Plants, delivered at the Belfast meeting of the British Association in 1874.