Make a magic loop from white.
01. ch 2 (counts as 1 st), hdc 9 into the loop, tighten the loop, slst 1 into the top of the beginning-ch-2 (2nd ch counted bottom-up) to close the rnd (9)
02. ch 2 (counts as 1 st), [hdc-inc] 9x, slst 1 into the top of the beginning-ch-2 to close the rnd (18)
03. ch 2, [hdc-inc, hdc 1] 9x (27)
Do NOT close the rnd with a slst this time! Instead go ahead working in a continous spiral:
04. hdc 1 into the top of the first hdc, dc-inc, hdc 1, sc 2, hdc 1, dc 2, hdc 1, sc 1, slst 1, sc 1, hdc 2, dc-inc, dc 1, hdc 2, sc 1, hdc 1, dc-inc, dc 1, hdc 1, slst 1, hdc 1, dc 1, hdc 1 (30)
05. slst 2, hdc-inc, sc 1, slst 2, sc 1, hdc 1, hdc-inc, slst 3, hdc 2, dc-inc 2, hdc 1, slst 2, sc 2, hdc-inc 2, slst 3, hdc 1, dc-inc, hdc 1, slst 1 (37)
06. slst 1, sc 1, hdc 1, hdc-inc, slst 3, sc 2, hdc 1, hdc-inc, hdc 1, sc 1, slst 3, sc 1, hdc 1, dc-inc 2, hdc 1, sc 1, slst 2, sc 2, hdc-inc, hdc 1, sc 1, slst 3, hdc 1, hdc-inc, hdc 1, sc 1, slst 1 (43)