intellectual industry. Efforts to record and publish the totality of public collections of vases began with the creation of the Corpus vasorum antiquorum under Edmond Pottier and the Beazley archive of John Beazley. Beazley and others following him have also studied fragments of Greek pottery in institutional collections, and have attributed many painted pieces to individual artists. Scholars have called these fragments disjecta membra (Latin for "scattered parts") and in a number of instances have been able to identify fragments now in different collections that belong to the same vase. Uses and types The names we use for Greek vase shapes are often a matter of convention rather than historical fact, a few do illustrate their own use or are labeled with their original names, others are the result of early archaeologists attempt to reconcile the physical object with a known name from Greek literature – not always successfully. To understand the relationship between form and function Greek pottery may be divided in four broad categories, given here with common types: storage and transport vessels, including the amphora, pithos, pelike, hydria, pyxis, mixing vessels, mainly for symposia or male drinking parties, including the krater, and dinos, jugs and cups, several types of kylix also just called cups, kantharos, phiale, skyphos, oinochoe and loutrophoros, vases for oils, perfumes and cosmetics, including the large lekythos, and the small aryballos and alabastron. As well as these utilitarian functions, certain vase shapes were especially associated with rituals, others with athletics and the gymnasium. Not all of their uses are known, but where there is uncertainty scholars make good proximate guesses of what use a piece would have served. Some have a purely ritual function, for example Some vessels were designed as grave markers. Craters marked the places of males and amphorae marked those of females. This helped them to survive, and is why some will depict funeral processions. White ground lekythoi contained the oil used as funerary offerings and appear to have been made solely with that object in mind. Many examples have a concealed second cup inside them to give the impression of being full of oil, as such they would have served no other useful gain. There was an international market for Greek pottery since the 8th century BC, which Athens and Corinth dominated down to the end of the 4th century BC. An idea of the extent of this trade can