The "dinosaurs" are still there and are an odd combination as they were sculpted from what they were thought to look like based on fossils found although some of the fossils didn't belong to the same creature.
Corpse at the Crystal Palace is another Daisy Dalrymple Mystery by Carola Dunn and set in the 1920s. Daisy is a likable character, intent on finding the murderer without stepping on her husband's toes (he's with the local constabulary). All in all it was a nice cozy read.
Note: There is a replica of the Crystal Palace in Dallas - The Infomart.