Complex sentence: While this practice was analogous to the practice of what is later called singing "capstan shanties," the form of these verses is not particularly similar to later shanties, and these songs do not appear to correspond to any shanty known to us from later eras.
Split into simpler sentences: While this practice was analogous to the practice of what is later called singing "capstan shanties," the form of these verses is not particularly similar to later shanties. These songs do not appear to correspond to any shanty known from later eras.