These mittens have been designed to be knitted flat then seamed. The experienced knitter can easily convert the mittend to being knitted in the round by decreasing the stitch count by two and not including the selvedge edge stitches.
There is a typo on patt row 13 of the right hand, the LC - left cross should be RC - right cross.
The row should read as follows:
Patt row 13: K4, P2, RC, P2, K1, M1, P2tog, P1, SSK, K1, K2tog, P2, K1, M1, K3, M1, K14.