The invertebrate collections of the museum are extensive and well displayed. Particularly interesting is the entomological cabinet which includes the de Nicéville lepidoptera and the Dugeon hymenoptera, the latter comprising about 1,000 type specimens. The entomological survey undertaken by the museum is its last development, establishing in 1903 the first entomological laboratory in India, in connection with a commission of forestry. Equally important are the geological materials exhibited in the museum.