Dangit!
Guys, in sorting through my hundred-and-score images in preparation for posting the information from the rest of the textbooks, I discovered I screwed up something somewhere and in all the textbook-searching and picture-taking I forgot to get two particular images, or (more likely) I somehow deleted them when I weeded out all the unusably blurry ones.
The pictures in question are the index to the 1966 textbook, and a particular image in the 1981 textbook.
The 1966 index I'm less concerned about, since I took pictures of the part of the book where Haeckel's drawings obviously would be, if the book actually used Haeckel. To wit:
The text even mentions that vertebrate embryos are similar to each other across species, but the only illustration is not a drawing, but a sole
photograph of a human embryo. I have pictures of the pages before and after this section, and a comparative
diagram of any type does not appear anywhere. The
Textbook History survey confirms this: according to the database, the text in question, Smith's
Exploring Biology, stopped showing comparative diagrams of any type after the 1949 edition.
More problematic is the missing figure from the 1981 book. Haeckel is not mentioned in the index (and I
do have the index for that book), and the context of the reference indicates it's simply a picture or depiction of the human embryo alone (as in the 1966 text). I do have the parts of the 1981 book that make it pretty clear that comparative embryology is considered a disused dead-end as far as evolutionary evidence is concerned (focusing instead on anatomical similarities in adult organisms), so given all the above I'm pretty sure that the missing image wasn't a comparative diagram. (EDIT: Not to mention that the 1981 book was co-authored by Stephen Jay Gould, who had a particular dislike for Haeckel, and so was unlikely at best to include Haeckel's drawing or anything derived from it in one of his textbooks).
I also only took pictures of limited sections of the 2002 book, but that was deliberate, because the pictures I took say everything that needs to be said regarding that book's view of Haeckel.
I don't give a single crap what randman thinks about this, but do
you guys want me to go back and get confirmatory pictures of the missing information?