He also noted that his species had more vertebrae than Marsh's in the back and neck, but proposed that Marsh was mistaken in assuming that the annectens specimens were complete in those regions.
Također je naglasio da je njegova nova vrsta imala više kralježaka u vratu i leđima nego Marshova, ali je pretpostavio da je Marsh pogriješio u svojoj pretpostavci da su primjerci annectens bili potpuni u tim regijama.