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. Author manuscript; available in PMC: 2009 Nov 7.
Published in final edited form as: Nature. 2009 May 7;459(7243):85–88. doi: 10.1038/nature07922

Figure 2. The relationship between brain size and cranial size for an intraspecific ‘ontogenetic’ model of dwarfing.

Figure 2

Major axis slopes and 95% confidence intervals: H. amphibius 0.468 (0.44 - 0.50) thin line, dwarf species pooled 0.454 (0.27 - 0.67) bold line. H. amphibius (filled diamonds; n = 37), H. lemerlei (filled triangles; n= 12), H. madagascariensis (open triangles; n = 12), C. liberiensis (crosses; n = 6). For statistical comparisons see Supplementary Table 1.