In this article, we show that the crossing number of K-3,K- n in a sur
face with Euler genus epsilon is right perpendicular n/(2 epsilon + 2)
left perpendicular (n - (epsilon + 1){1 + left perpendicular n/(2 epsi
lon + 2)left perpendicular}). This generalizes a result of Guy and Jen
kyns, who obtained this result for the toru. (C) 1996 John Wiley & Son
s, Inc.