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$\\gamma_{\\eta}(x)=x^{-1}\\cdot\\eta(x),$ $x\\in M,$ where $\\mathbb{S}^{6}$ is the unit sphere of $T_{1}\\mathbb{S}^{7},$ $1$ is the neutral element of $\\cdot$ in $\\mathbb{S}^{7}.$ Denoting by $\\mathcal{N}(M)$ the vector bundle of normal sections of $M$ we set, for $\\eta$ $\\in\\mathcal{N}(M),$ $S_{\\eta}(X)=-\\left(\\nabla_{X}\\eta\\right) ^{\\top},$ $X\\in TM.$ Considering the 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