here made of the beautiful violet crystals of fluor-apatite which occur
in the veins of tin-ore in the Erzgebirge, and of the brilliant
bluish-green crystals encrusting cavities in the granite of Luxullian in
Cornwall. Another common mode of occurrence of apatite is in metamorphic
crystalline rocks, especially in crystalline limestones: in eastern
Canada extensive beds of apatite occur in the limestones associated with
the Laurentian gneisses. Still another mode of occurrence is presented
by beautifully developed and transparent crystals found with crystals of
felspar and quartz lining the crevices in the gneiss of the Alps.
Crystallized apatite is also occasionally found in metalliferous veins,
other than those of tin, and in beds of iron ore; whilst if the massive
varieties (phosphorite) be considered many other modes of occurrence
might be cited. (L. J. S.)

APATURIA ([Greek: Apatouria]), an ancient Greek festival held annually
by all the Ionian towns except Ephesus and Colophon (Herodotus i. 147).
At Athens it took place in the month of Pyanepsion (October to
November), and lasted three days, on which occasion the various
phratries (i.e. clans) of Attica met to discuss their affairs. The name
is a slightly modified form of [Greek: apatoria = hamapatoria,
homopatoria], the festival of "common relationship." The ancient
etymology associated it with [Greek: apate] (deceit), a legend existing
that the festival originated in 1100 B.C. in commemoration of a single
combat between a certain Melanthus, representing King Thymoetes of
Attica, and King Xanthus of Boeotia, in which Melanthus successfully
threw his adversary off his guard by crying that a man in a black goat's
skin (identified with Dionysus) was helping him (Schol. Aristophanes,
_Acharnians_, 146). On the first day of the festival, called Dorpia or
Dorpeia, banquets were held towards evening at the meeting-place of the
phratries or in the private houses of members. On the second, Anarrhysis
(from [Greek: anarruein], to draw back the victim's head), a sacrifice
of oxen was offered at the public cost to Zeus Phratrius and Athena. On
the third day, Cureotis ([Greek: koureotis]), children born since the
last festival were presented by their fathers or guardians to the
assembled phratores, and, after an oath had been taken as to their
legitimacy and the sacrifice of a goat or a sheep, their names were
inscribed in the register. The name [Greek: koureotis] is