A bibliography on the Testudines and Crocodilians of Sri Lanka: a Checklist and an Annotated Bibliography (de Silva, 1998) was published approximately 23 years earlier. It listed 378 references pertaining to testudines and crocodilians of the country. The current monograph list 852 references including all the references that st were listed in the above work. This work includes references up to 31 March, 2021. We have personally checked all references listed in this work, except Numbers 24, 67 and in crocodilian section numbers 116 and 276.