Contents: Introduction. 1. Siwalik vertebrate fossil collection. 2. The Siwalik fossil park. 3. Life size models of pre-historic animals. Geology of Saketi Area: 4. Siwalik stratigraphy. 5. Fossils and samples in the Siwalik Fossil park. 6. List of fossils exhibited in the museum. 7. Description of fossils SFP/1 to SFP/263. 8. Stratigraphic distribution of the taxa recorded in the catalogue. Epilogue. References. The Siwalik Fossil Park is situated amidst picturesque exposures of the Siwalik hills in the Markanda Valley at Saketi in Sirmaur district, Himachal Pradesh. The park has been developed by the Geological Survey of India in collaboration with the Government of Himachal Pradesh. It is about 4.5 km far from Kala Amb, 85 km from Chandigarh, 65 km from Ambala and 22 km from Nahan. The Museum is situated within the Park. The Siwalik Group of rocks are famous all over the world, for the embedded remains of various vertebrate animals and plants that flourished during a time span of 25 million years and evolved along diverging lines giving rise to present day forms of land animals and plants. The Siwalik Fossil Park, inaugurated on 23rd March 1974, is a rare gift of nature and a rich geological heritage. The park displays six life size, fiber glass models of prehistoric animals which thrived in the area 1-2.5 million years ago. The fossilized remains of these animals have been recovered from rocks around Saketi. Many spectacular fossil specimens of this collection have been exhibited in a museum in the park. In addition to this the site has been developed to give a panorama of pilo-pleistocene period (2.5 million years ago) through massive afforestation. It is a significant step towards preservation of prehistoric animal sites for their utilization as scientific educational and recreational purposes.