728 or frozen form) that occurs in all other dialects (but see 10-2.41.21) Other features shared by Calacoa and/or Sitajara are the peripheral features 10-2.21.14, 10-2.41.18, 10-2.41.19, and 10-2.41.21, and the cross-regional features 10-2.51.31 and 10-2.52. 10-2.4 Peripheral (as distinguished from central) dialects The following features, most of which involve phonological shapes, do not occur in the two La Paz dialects most thoroughly investigated until now: Compi and Tiahuanaco. They do occur in certain other dialects already identified as northern, southern, or intermediate. 10-2.41 Features shared by several dialects 10-2.41.1 Phonological shapes and morphophonemics 10-2.41.11 Voicing of prevocalic stops after homorganic nasals Northern: Huancané (optional) Intermediate: Sitajara (optional) Southern: Salinas (obligatory within morphemes, optional otherwise; also occurs after palatal lateral); Corque (optional) 10-2.41.12 Demonstrative /k"u/ ~ /k"u:/ ~ /k"uyu/ Northern: Huancané (also has /k"uri/) Southern: Salinas, Morocomarca