Yes, the Clore Pavilion quite infamously used to be absolutely full of tiny exhibits until I believe the mid-90s.
I remember going into that building in 1996 as a 10 year old and being blown away by the number of exhibits and species. Back then I was just excited about seeing as many animals as possible and less concerned about the welfare of the animals.
Was surprised to see what had been done to the building in 2014 when I returned but felt the changes were excellent. First time I'd seen a Tamandua and it was right there on the walkway alongside us.
Memories of the old small mammal and nocturnal house back in 1996 are fairly hazy but I remember upstairs a mouse deer walking in circles in a small tank, various squirrels, small monkeys, tree porcupines and downstairs fennec fox, sand cat, sloth, possums, opossums, bats, bushbabies, Loris. Would love to know what else I might have seen at that time.