Complex sentence: Other forms appear as non-convective layered sheets and as limited-convective rolls or ripples at various altitudes, as with low stratus, stratocumulus and their middle and high family varients; identified respectively by the prefixes "alto"-and "cirro" -.
Split into simpler sentences: Other forms appear as non-convective layered sheets like low stratus, and as limited-convective rolls or ripples as with with stratocumulus. Both these forms have middle and high family varients identified respectively by the prefixes "alto"-and "cirro" -.