Larsson laments that '' ( t ) he broad ranges of body mass estimates , combined with the ambiguous ratio of endocranial volume occupied by the brain , present a high degree of uncertainty for ( creating an ) index of brain size . ''
Larsson laments that '' ( t ) he broad ranges of body mass estimates , combined with the ambiguous ratio of endocranial volume occupied by the brain , present a high degree of uncertainty for ( creating an ) index of brain size '' .