After outlining the structural linguistic approach to form classes in general and Spanish nouns and adjectives in particular, the author concludes that "nouns and adjectives in Spanish cannot be characterized in any satisfactory fashion by their occurrence in morphological or syntactic frames." The grammatical framework used for this study is "the transformational model of linguistic description, as formulated by Chomsky (1957, 1964, 1965) and others." Major chapter headings are: 1. Introduction (Approaches to Word Classes, Criticisms); 2. Spanish Nouns and Adjectives (Structural Treatment, Transformational Grammar Model, Sub-Categorization Problems, Syntactic Features); 3. Discussion of Rules (Base Rules, Lexicon, Transformational Rules, Phonological Rules); and 4. Conclusions. Appended are a list of the rules of the grammar and a sample general linguistic terminology, the author has included brief definitions and examples of some of the basic concepts (sub-categorizational rules, syntactic features, complex symbols, etc.) which she uses in her analysis. (JD)