Where is the fossil evidence?

"The absence of fossil evidence for intermediary stages between major transitions in organic design, indeed our inability, even in our imagination, to construct functional intermediates in many cases, has been a persistent and nagging problem for gradualistic accounts of evolution." [Stephen Jay Gould, Is a New and General Theory of Evolution Emerging? Paleobiology, Vol. 6, January 1980, p. 127. Professor of Geology and Paleontology, Harvard University.]