11. He undertook postgraduate research into fossil fishes at University College London and obtained a PhD in 1961. 12. It subsequently became a fossil with a perfectly formed, undigested 6-foot fossil fish inside it. 13. His monograph of the Haplolepidae sets a new standard for taxonomic work on fossil fish " ." 14. Also included are areas which show important exposures of the Devonian sequence and yields several species of fossil fishes . 15. His studies of rocks and fossils in Scotland overturned earlier work on fossil fish , establishing new taxonomic classifications. 16. Mixed in with the muck is an occasional fossil fish tooth, about one-fortieth of an inch long. 17. Considerable quantities of fossil fishes have also been found, mainly sharks, and it is the type locality for several species. 18. The town boasts a half-dozen fossil fish emporiums and places where visitors can try their hand at excavating their own souvenirs. 19. He studied, described and listed hundreds of species of fossil fish , beginning the serious study into the lives of extinct animals. 20. Five of the six main fossil fish groups from this period ( dating from 370 million years ago ) can be found here.
