This is a preliminary report on the testing of two hypotheses related to the acquisition of Spanish phonemes, namely that in the nasal series, production of the labial is acquired before the dental, followed by the velar; and that the liquid series, containing "l", "r", and trilled "r" (rr) will be the last class of sounds to be acquired. These hypotheses were tested on six Spanish-speaking children. The intervocalic position was chosen as that of maximal contrast. On a weekly basis, over a period of five months, the subjects were asked to imitate nonsense syllables containing the form VCV, allowing for the collection of data on all 18 Spanish consonant phonemes in three environments: a-a, i-e, and u-o. In addition, spontaneous speech and real word imitation was allowed, but not analyzed in this report. The sessions were recorded on tape and phonetically transcribed. Taking instability to indicate recent acquisition, the results neither disprove nor prove the first part of hypothesis 1; seem to support part 2 of hypothesis 1; and seem to support hypothesis 2. The conclusion calls for further study on younger Spanish-speaking children. An appendix lists all stimulus items that were used. (AM)