Number 31 in a Series of 50

The title was inspired by the cards which once accompanied packets of tea. (Much of my paltry knowledge is the result of collecting these cards). There isn't actually a series of 50. Rather less, if we're being exact*, and fewer than 31 for sure.
(* we are definitely not being exact).
Fujifilm FinePix S3 Pro + AF Nikkor 35-70mm f/2.8 lens.