It seems that Bonda uses the term 'hippogonal' for what we call 'oblique'. That seems just as wrong as calling all moves that are not orthogonal diagonal. If a name for a Camelrider ray was needed I would call it a camelogonal.
So I think the conclusion that hippogonal can mean anything other than Nightrider rays is false, and the correct conclusion is that Bonda abuses the term.
For any (1,N) leaper one can make lame and/or sliding variations, by either extending their move with an orthogonal slide in the long direction, and/or requiring they slide to their destination along that same orthogonal. In the latter case you still have the possibility to choose where the slide starts, making the piece only partly lame. It seems not very useful to make up names for all of these, especially since most possibilities are never used.
It seems that Bonda uses the term 'hippogonal' for what we call 'oblique'. That seems just as wrong as calling all moves that are not orthogonal diagonal. If a name for a Camelrider ray was needed I would call it a camelogonal.
So I think the conclusion that hippogonal can mean anything other than Nightrider rays is false, and the correct conclusion is that Bonda abuses the term.
For any (1,N) leaper one can make lame and/or sliding variations, by either extending their move with an orthogonal slide in the long direction, and/or requiring they slide to their destination along that same orthogonal. In the latter case you still have the possibility to choose where the slide starts, making the piece only partly lame. It seems not very useful to make up names for all of these, especially since most possibilities are never used.