First published in 1994. This study aims to provide evidence for the natural class of sounds comprised of front vowels, front glides and coronal consonants. The author also shows that a revised definition of the articulator feature [coronal] properly characterises this natural class of sounds. The study provides a formal representation of front vowels and coronal consonants and their interaction within a nonlinear model of feature organisation. This title will be of interest to students of language and linguistics.