Anerythristic and albino are seperate mutations. 'snow' is an individual that shows both of these mutations at the same time, a het snow will be a normal looking snake that is heterozygous for both anerythristic and albino. So, yes anerythristics are one of the possible morphs coming from that combination. Also, in addition to that, your anerythristics will each be 66% possible het for albino.