He was one of the founders of the Malacological Society of London and was president of the Conchological Society of Great Britain & Ireland on two separate occasions. Tomlin named more than a hundred taxa of gastropod molluscs, including:
The family Abyssochrysoidea Tomlin, 1927
The family Columbariidae Tomlin, 1928
He also named some scaphopods and bivalves.