Fig. 40. Plot of scores of the second canonical root obtained by canonical variates analysis of seven cranial dimensions from 12 species of Natalidae. CII is an axis of rostrum shape, being most influenced by maxillary tooth row (table 2). Black dots are score means and gray bars represent two standard deviations around the mean. Species toward the positive side of the axis have long, narrow rostra, whereas species toward the negative side have relatively short, broad rostra. Long and broadly curved mesostylar crests occur only in species with long, narrow rostra.