Who gave the coelacanth its current
scientific name ? What is the name of
the book he wrote about the coelacanth
in the mid 1950's ?

It was James Leonard Brierley Smith who named the fish after Latimer.

The book he wrote was called 'Old Fourlegs, The Story of the Coelacanth'

Yes indeedily !

Thanks for the answer Jenny Roberts !