To Clarify ;
The Great Exhibiton of 1851in Hyde Park was planned years before the building it was to held in had been designed.
When Joseph Paxton's glass and iron design was accepted in 1850, it was instantly nick-named "The Crystal Palace."
This name continued, when the Crystal Palace Company was formed in 1852, to permanently re-erect the building at SYDENHAM, where it stood from 1854 till 1936, when it burned to the ground.
The thread above, covers the collection of plaster casts of contemporary sculture, bought by the Crystal Palace Company and displayed at SYDENHAM
from 1854 - 1936.
The image you have linked to shows a crouching female figure with '1851 EXHIBITION' underneath. This is a souvenir of the Great Exhibition of 1851, and shows an example of the sculpture which was submitted to the exhibition committee by sculptors and manufacturers, and to be sold or returned at the end of that year.
I havn't made an exhaustive study of the sculpture at the Great Exhibition as it is very well recorded, and suggest you consult "The Illustrated Exhibitor" for example. Here is a link I've just found, and shows an example of the French sculpture.http://www.bl.uk/learning/images/victor ... 02696.html
I have added images of the two sculptures at SYDENHAM
with the same title, but one is a standing female figure by James Legrew, and the other has a standing male figure as well as a crouching female one. Neither the one you are looking for . . . . .
Massacre of the Innocents by James Legrew at the Crystal Palace SYDENHAM
, standing directly under the "LAM" of Lambeth.
Massacre of the Innocents by George Gamon Adams - on the left, at the Crystal Palace SYDENHAM.
. . . . and again at the International Exhibition 1862, South Kensington.
Hope this helps.