  Let $ \mathfrak{C}^+_{ns}(p) $ be the Cuspidal Divisor Class Group of the
modular curves $X^+_{ns}(p) $ associated to the normalizer of a non-split
Cartan subgroup of level $ p$. I study the $ p-$primary part of $
\mathfrak{C}^+_{ns}(p) $ and estimate the order of growth of $
|\mathfrak{C}^+_{ns}(p)| $.
