Proceratosaurus

Proceratosaurus was a primitive coelurosaurian theropod that lived in England, Europe in the Early Jurassic Period. It looked somewhat similar to the later Ceratosaurus, for which it is named after, but only due to also having a hornlike crest. Despite its name, it is not related to Ceratosaurus. Overall, Proceratosaurus was a much more gracile and delicate animal. Recent research has speculated with good supporting evidence that Proceratosaurus is in fact the earliest tyrannosauroid. Since only part of the crest is reserved, its possible it had a crest similar to Guanlong, Kileskus and Sinotyrannus.

More real-life information: Proceratosaurus at Wikipedia.

Jurassic Park Franchise
In the first film, Proceratosaurus' name was briefly shown in the Cold Storage Room where its embryos were, but was ultimately never seen. It never appears in the rest of the Jurassic Park Series, although the similar but unrelated Ceratosaurus had a brief appearance in.

Jurassic Park
The name "Proceratosaurus" is briefly seen in the second embryo vial of the Cold Storage Room. This suggests the animal was an attraction on Isla Nublar, but it's never witnessed on the tour. Since all animals of the Park were first bred on Isla Sorna, it's suggested that they also inhabit that island. It's unclear if the dinosaur was in the park, but it probably was since it had its own paddock, seen on the brochure map.