------------------------------+--------------+--------------
| 9 males | 12 females
+-----+--------+-----+--------
|Cases|Per cent|Cases|Per cent
------------------------------+-----+--------+-----+--------
Oval or nearly so | 1 | 11 | 5 | 42
Slightly elevated or keeled | 4 | 44 | 5 | 42
Moderately keeled | 2 | 22 | 1 | 8
Markedly keeled | 2 | 22 | 1 | 8
------------------------------+-----+--------+-----+--------