  Comment on `Anomalously Large Gap Anisotropy in the a-b Plane of Bi$_{{\bf
2}}$Sr$_{{\bf 2}}$CaCu$_{{\bf 2}}$O$_{{\bf 8+}{\delta}}$', Kazumasa Miyake and
Osamu Narikiyo, In a recent Letter, Shen and collaborators [Phys. Rev. Lett.
{\bf 70}, 1555 (1993)] reported that angle-resolved photoemission spectra
(ARPES) in Bi-2212 cuprate superconductor far below $T_{{\rm c}}$ has
anomalously large anisotropy and then concluded that the symmetry of Cooper
pair is likely to be $d_{x^{2}-y^{2}}$, i.e., $\Delta_{{\bf k}}=\Delta(\cos
k_{x}a-\cos k_{y}a)$. In this Comment we point out that the interpretation done
by Shen {\it et al\/.}, where the shift of edge near Fermi level has been
identified with the gap $\Delta_{{\bf k}}$, is not unambiguous, and that a
possibility of $d_{xy}$ pairing, i.e., $\Delta_{{\bf k}}=2\Delta\sin k_{x}a\sin
k_{y}a$, cannot be ruled out.
