Based on Darwinian evolution, there should be millions of intermediate fossils. When we examine the textbooks, there are limited suggested examples of intermediate fossils are given. And the examples are mostly drawn by the artists.
Why don't we see an abundant list of transitions in the textbooks? The answer is that there are no intermediate fossils. Most biology textbooks use the horse series as evidence of species evolving. The books have the horses from the smallest to largest with a sequence. The problem with this sequence is that they were not found in this order. They have been found buried in the same layer of strata indicating they lived at the same. The difficulties of the horse series is this.
1) A complete series of horse fossils is not found in any one place in the world arranged in the rock strata in the proper evolutionary order from bottom to top. The sequence depends on arranging Old World and New World fossils side by side, and there is considerable dispute as to what order they should be put in.
2) Eohippus, supposedly the first horse, doesn't look like one and was not classified as classified. It is interesting the present-day Hyrax, both in in its skeletal structure and the way of life that it is supposed to have lived. Eohippus fossils have been found in the surface strata with two modern horses, Equus nevadensis and Equus occidentalis.
3) Museum promotes and textbook evolutionary ladders illustrate only a partial and favorable selection of reconstructed horses. The trend seems to have been toward larger horses, the first three supposed horse fossils (Eohippus, Orohippus and Epihisppus) actually decline in size. The range in size of horses alive today, from the tiny American miniatures to the great shire horses of northern Britain, is the same as is found in the fossils record.
4) The sequence from many-toed to one-toed animals is equally erratic, with numerous contradictions and regressions to the theoretically ideal order.
5) If you have all the fossils, there appear to be major progression in size of the horses from one genus to the next without transitional example.