Between the addition of worm body parts and the phrasing of engulfing/
digesting status, I remembered an oddity with the vanquished monster list:
it shows baby long worms right next to adult long worms; both were defined
as level 8 monsters. It also turns out that babies dealt more damage per
attack than adults; that was counterintuitive, to put it mildly. Boost
long worms from level 8 to 9; drop baby long worms from level 8 to 5, half
rounded up just like the relationship between baby and adult purple worms
(who are levels 8 and 15, respectively). And increase the damage for adult
long worm attack (was 1d4, now 2d4); drop it for baby (was 1d6, now 1d4).