Pic isnt the greatest but looks like something ive seen before. what it looks like to me is a couple layers of built up stuck shed. you need to soak it a couple times a week and gently massage it as you handle it. eventually it will come off. I wouldn't soak the whole snake that often because it can be stressfull for them but rather use a wet warm cloth and hold it on there. also try boosting its humidity into the upper sixties for awhile. be careful not to pick at it or just pull it off as it can tear the live flesh with it if its not completly sofened.