Contents: Foreword. Acknowledgements. 1. Introduction. 2. Stratigraphy. 3. Biostratigraphy. 4. Systematics. 5. References. Plates 1-36 with explanations. From the Foreword: "The volume 1 on Mesozoic Dinoflagellate Cysts contains documentation of 86 species belonging to 58 genera. These have been illustrated through 36 well organized photoplates. An updated biostratigraphy of Mesozoic sediments based on study of Key Wells-Ramachandrapuram-A, Mahendravada-A, Endamuru-A, Draksharma-A, Narasapur-A and Mori-A has been established data on plaeoenvironment and relative changes in sea-level based on marine/terrestrial Palynofossi Groups, Dinocyst Peaks integrated with Sedimentological and well log interpretation data helped in building sequence biostratigraphy. Such well data is also included."