In the Yearbook of Morphology 2004 a number of papers is devoted to the topic ‘morphology and linguistic typology’. These papers were presented at the Fourth Mediterranean Morphology Meeting in Catania, in September 2003. Within the context of this denominator, a number of issues are discussed wich bear upon universals and typology. These issues include: universals and diachrony, sign language, syncretism, periphrasis, etc.