91 described adaptation of Spanish loans to Aymara phonology (Hardman et al. 1975:3.81-88). Depending on the extent of the speaker's knowledge of Spanish phonology, such loans may be more or less ‘Aymarized'. As will be noted in examples in other chapters, certain speakers incor- porate Spanish loans that preserve some Spanish phonemes (for example /b/ or /g/) while other speakers adapt such loans to Aymara phonology. The whole process of entry of Spanish loans into Aymara merits a study of its own taking into account sociocultural factors. (See Chapter 9 for a discussion of heavily Spanish-influenced Aymara dialects. Aymara influence’ on Bolivian altiplano Spanish is now being investigated by H. Martin and Laprade. ) 3-4 Phonological Correspondences Within and Across Dialects One morpheme (the base form) may have a slightly different phonemic shape in one dialect (or idiolect) than in another. Usually differences of one or two pho- nemes are involved. Some phonological correspondences within or across dialects parallel morphophonemic varia- tion within certain dialects: the rules that change one phoneme to another or delete or retain phonemes in certain morphemes in certain environments. These morpho- phonemic rules are discussed in Chapter 4.