Here are some pictures of three different forms of Tylototriton verrucosus, at least that's what they are called now... Did I hear somebody say species complex?
Small dark form (I believe the same as your animals John?)
Large light form (much more terrestrial than to other forms, at least in my experience):
Large dark form (looks mutch like the previous form, but I've never seen the two forms in the same import):
Small dark form (I believe the same as your animals John?)

Large light form (much more terrestrial than to other forms, at least in my experience):

Large dark form (looks mutch like the previous form, but I've never seen the two forms in the same import):
